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pyparsing module - Classes and methods to define and execute parsing grammars
=============================================================================
The pyparsing module is an alternative approach to creating and
executing simple grammars, vs. the traditional lex/yacc approach, or the
use of regular expressions. With pyparsing, you don't need to learn
a new syntax for defining grammars or matching expressions - the parsing
module provides a library of classes that you use to construct the
grammar directly in Python.
Here is a program to parse "Hello, World!" (or any greeting of the form
``"<salutation>, <addressee>!"``), built up using :class:`Word`,
:class:`Literal`, and :class:`And` elements
(the :class:`'+'<ParserElement.__add__>` operators create :class:`And` expressions,
and the strings are auto-converted to :class:`Literal` expressions)::
from pip._vendor.pyparsing import Word, alphas
# define grammar of a greeting
greet = Word(alphas) + "," + Word(alphas) + "!"
hello = "Hello, World!"
print (hello, "->", greet.parseString(hello))
The program outputs the following::
Hello, World! -> ['Hello', ',', 'World', '!']
The Python representation of the grammar is quite readable, owing to the
self-explanatory class names, and the use of '+', '|' and '^' operators.
The :class:`ParseResults` object returned from
:class:`ParserElement.parseString` can be
accessed as a nested list, a dictionary, or an object with named
attributes.
The pyparsing module handles some of the problems that are typically
vexing when writing text parsers:
- extra or missing whitespace (the above program will also handle
"Hello,World!", "Hello , World !", etc.)
- quoted strings
- embedded comments
Getting Started -
-----------------
Visit the classes :class:`ParserElement` and :class:`ParseResults` to
see the base classes that most other pyparsing
classes inherit from. Use the docstrings for examples of how to:
- construct literal match expressions from :class:`Literal` and
:class:`CaselessLiteral` classes
- construct character word-group expressions using the :class:`Word`
class
- see how to create repetitive expressions using :class:`ZeroOrMore`
and :class:`OneOrMore` classes
- use :class:`'+'<And>`, :class:`'|'<MatchFirst>`, :class:`'^'<Or>`,
and :class:`'&'<Each>` operators to combine simple expressions into
more complex ones
- associate names with your parsed results using
:class:`ParserElement.setResultsName`
- access the parsed data, which is returned as a :class:`ParseResults`
object
- find some helpful expression short-cuts like :class:`delimitedList`
and :class:`oneOf`
- find more useful common expressions in the :class:`pyparsing_common`
namespace class
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A cross-version compatibility configuration for pyparsing features that will be
released in a future version. By setting values in this configuration to True,
those features can be enabled in prior versions for compatibility development
and testing.
- collect_all_And_tokens - flag to enable fix for Issue #63 that fixes erroneous grouping
of results names when an And expression is nested within an Or or MatchFirst; set to
True to enable bugfix released in pyparsing 2.3.0, or False to preserve
pre-2.3.0 handling of named results
Ta�
Diagnostic configuration (all default to False)
- warn_multiple_tokens_in_named_alternation - flag to enable warnings when a results
name is defined on a MatchFirst or Or expression with one or more And subexpressions
(only warns if __compat__.collect_all_And_tokens is False)
- warn_ungrouped_named_tokens_in_collection - flag to enable warnings when a results
name is defined on a containing expression with ungrouped subexpressions that also
have results names
- warn_name_set_on_empty_Forward - flag to enable warnings whan a Forward is defined
with a results name, but has no contents defined
- warn_on_multiple_string_args_to_oneof - flag to enable warnings whan oneOf is
incorrectly called with multiple str arguments
- enable_debug_on_named_expressions - flag to auto-enable debug on all subsequent
calls to ParserElement.setName()
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rZ t| ��t�� d�}td�}|�dd� � |� |�S X dS )a Drop-in replacement for str(obj) that tries to be Unicode
friendly. It first tries str(obj). If that fails with
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< returns the unicode object | encodes it with the default
encoding | ... >.
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}|V qd S )Nr )r �yr r r � <genexpr> s r� � c C s> d}dd� d� � D �}x"t||�D ]\}}| �||�} q"W | S )z/Escape &, <, >, ", ', etc. in a string of data.z&><"'c s s | ]}d | d V qdS )�&�;Nr )r �sr r r r� s z _xml_escape.<locals>.<genexpr>zamp gt lt quot apos)�split�zip�replace)�data� from_symbols�
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whitespace)r �cr r r r� s c s@ |d k r |nd�|rt nt� t���t��� ��fdd��}|S )Nz failed user-defined conditionc s t �| ||��s � | |���d S )N)�bool)r� �lr� )�exc_type�fn�msgr r �pa% s z"conditionAsParseAction.<locals>.pa)r> r< � _trim_arityr )r� �message�fatalr� r )r� r� r� r r� s
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parserElement�args)�selfr� r� r� �elemr r r �__init__0 s zParseBaseException.__init__c C s | |j |j|j|j�S )z�
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rh )rW �columnre N)rh r� r� rW re �AttributeError)r� �anamer r r � __getattr__C s z ParseBaseException.__getattr__c C s^ | j r@| jt| j �kr d}qDd| j | j| jd � �dd�}nd}d| j|| j| j| jf S )Nz, found end of textz
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Exception thrown when parse expressions don't match class;
supported attributes by name are:
- lineno - returns the line number of the exception text
- col - returns the column number of the exception text
- line - returns the line containing the exception text
Example::
try:
Word(nums).setName("integer").parseString("ABC")
except ParseException as pe:
print(pe)
print("column: {}".format(pe.col))
prints::
Expected integer (at char 0), (line:1, col:1)
column: 1
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Method to take an exception and translate the Python internal traceback into a list
of the pyparsing expressions that caused the exception to be raised.
Parameters:
- exc - exception raised during parsing (need not be a ParseException, in support
of Python exceptions that might be raised in a parse action)
- depth (default=16) - number of levels back in the stack trace to list expression
and function names; if None, the full stack trace names will be listed; if 0, only
the failing input line, marker, and exception string will be shown
Returns a multi-line string listing the ParserElements and/or function names in the
exception's stack trace.
Note: the diagnostic output will include string representations of the expressions
that failed to parse. These representations will be more helpful if you use `setName` to
give identifiable names to your expressions. Otherwise they will use the default string
forms, which may be cryptic to read.
explain() is only supported under Python 3.
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the parsed data:
- as a list (``len(results)``)
- by list index (``results[0], results[1]``, etc.)
- by attribute (``results.<resultsName>`` - see :class:`ParserElement.setResultsName`)
Example::
integer = Word(nums)
date_str = (integer.setResultsName("year") + '/'
+ integer.setResultsName("month") + '/'
+ integer.setResultsName("day"))
# equivalent form:
# date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
# parseString returns a ParseResults object
result = date_str.parseString("1999/12/31")
def test(s, fn=repr):
print("%s -> %s" % (s, fn(eval(s))))
test("list(result)")
test("result[0]")
test("result['month']")
test("result.day")
test("'month' in result")
test("'minutes' in result")
test("result.dump()", str)
prints::
list(result) -> ['1999', '/', '12', '/', '31']
result[0] -> '1999'
result['month'] -> '12'
result.day -> '31'
'month' in result -> True
'minutes' in result -> False
result.dump() -> ['1999', '/', '12', '/', '31']
- day: 31
- month: 12
- year: 1999
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�r^ || |< Y nX d S )NFr r� )r �_ParseResults__name�_ParseResults__parent�_ParseResults__accumNames�_ParseResults__asList�_ParseResults__modal�list�_ParseResults__toklist�_generatorType�dict�_ParseResults__tokdictr� r� r� �
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zParseResults.__init__c C sP t |ttf�r| j| S || jkr4| j| d d S tdd� | j| D ��S d S )Nr� r c S s g | ] }|d �qS )r r )r �vr r r r X s z,ParseResults.__getitem__.<locals>.<listcomp>)r� r� �slicer r r r? )r� r� r r r r
Q s
zParseResults.__getitem__c C s� ||t �r0| j�|t� �|g | j|< |d }nD||ttf�rN|| j|< |}n&| j�|t� �t |d�g | j|< |}||t�r�t| �|_ d S )Nr )
r r r� r r� r$ r r? �wkrefr )r� �kr# r� �subr r r � __setitem__Z s
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zParseResults.__setitem__c
C s� t |ttf�r�t| j�}| j|= t |t�rH|dk r:||7 }t||d �}tt|�|�� �}|�� x^| j �
� D ]F\}}x<|D ]4}x.t |�D ]"\}\}} t || | |k �||< q�W q|W qnW n| j |= d S )Nr r� )
r� r� r$ r� r r �range�indices�reverser �itemsr� r )
r� r� �mylen�removedr � occurrences�jr& �value�positionr r r � __delitem__g s
$zParseResults.__delitem__c C s
|| j kS )N)r )r� r& r r r � __contains__| s zParseResults.__contains__c C s
t | j�S )N)r� r )r� r r r �__len__ s zParseResults.__len__c C s
| j S )N)r )r� r r r �__bool__� s zParseResults.__bool__c C s
t | j�S )N)�iterr )r� r r r �__iter__� s zParseResults.__iter__c C s t | jd d d� �S )Nr� )r7 r )r� r r r � __reversed__� s zParseResults.__reversed__c C s$ t | jd�r| j�� S t| j�S d S )N�iterkeys)�hasattrr r: r7 )r� r r r � _iterkeys� s
zParseResults._iterkeysc s � fdd�� � � D �S )Nc 3 s | ]}� | V qd S )Nr )r r& )r� r r r� � s z+ParseResults._itervalues.<locals>.<genexpr>)r< )r� r )r� r � _itervalues� s zParseResults._itervaluesc s � fdd�� � � D �S )Nc 3 s | ]}|� | fV qd S )Nr )r r& )r� r r r� � s z*ParseResults._iteritems.<locals>.<genexpr>)r< )r� r )r� r �
_iteritems� s zParseResults._iteritemsc C s t | �� �S )zVReturns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x).)r r: )r� r r r �keys� s zParseResults.keysc C s t | �� �S )zXReturns all named result values (as a list in Python 2.x, as an iterator in Python 3.x).)r �
itervalues)r� r r r �values� s zParseResults.valuesc C s t | �� �S )zfReturns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x).)r � iteritems)r� r r r r, � s zParseResults.itemsc C s
t | j�S )z�Since keys() returns an iterator, this method is helpful in bypassing
code that looks for the existence of any defined results names.)r� r )r� r r r �haskeys� s zParseResults.haskeysc O s� |s
dg}x6|� � D ]*\}}|dkr2|d |f}qtd| ��qW t|d t�sht|�dksh|d | kr�|d }| | }| |= |S |d }|S dS )a�
Removes and returns item at specified index (default= ``last``).
Supports both ``list`` and ``dict`` semantics for ``pop()``. If
passed no argument or an integer argument, it will use ``list``
semantics and pop tokens from the list of parsed tokens. If passed
a non-integer argument (most likely a string), it will use ``dict``
semantics and pop the corresponding value from any defined results
names. A second default return value argument is supported, just as in
``dict.pop()``.
Example::
def remove_first(tokens):
tokens.pop(0)
print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
label = Word(alphas)
patt = label("LABEL") + OneOrMore(Word(nums))
print(patt.parseString("AAB 123 321").dump())
# Use pop() in a parse action to remove named result (note that corresponding value is not
# removed from list form of results)
def remove_LABEL(tokens):
tokens.pop("LABEL")
return tokens
patt.addParseAction(remove_LABEL)
print(patt.parseString("AAB 123 321").dump())
prints::
['AAB', '123', '321']
- LABEL: AAB
['AAB', '123', '321']
r� �defaultr z-pop() got an unexpected keyword argument '%s'r� N)r, r! r� r� r� )r� r� �kwargsr& r# �indexr� � defaultvaluer r r �pop� s % zParseResults.popc C s || kr| | S |S dS )a[
Returns named result matching the given key, or if there is no
such name, then returns the given ``defaultValue`` or ``None`` if no
``defaultValue`` is specified.
Similar to ``dict.get()``.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
result = date_str.parseString("1999/12/31")
print(result.get("year")) # -> '1999'
print(result.get("hour", "not specified")) # -> 'not specified'
print(result.get("hour")) # -> None
Nr )r� �key� defaultValuer r r r� � s zParseResults.getc C sZ | j �||� xF| j�� D ]8\}}x.t|�D ]"\}\}}t||||k �||< q,W qW dS )a
Inserts new element at location index in the list of parsed tokens.
Similar to ``list.insert()``.
Example::
print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
# use a parse action to insert the parse location in the front of the parsed results
def insert_locn(locn, tokens):
tokens.insert(0, locn)
print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
N)r �insertr r, r� r )r� rF �insStrr r/ r& r1 r2 r r r rK s zParseResults.insertc C s | j �|� dS )a�
Add single element to end of ParseResults list of elements.
Example::
print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
# use a parse action to compute the sum of the parsed integers, and add it to the end
def append_sum(tokens):
tokens.append(sum(map(int, tokens)))
print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
N)r r� )r� �itemr r r r� s
zParseResults.appendc C s& t |t�r| �|� n | j�|� dS )a
Add sequence of elements to end of ParseResults list of elements.
Example::
patt = OneOrMore(Word(alphas))
# use a parse action to append the reverse of the matched strings, to make a palindrome
def make_palindrome(tokens):
tokens.extend(reversed([t[::-1] for t in tokens]))
return ''.join(tokens)
print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
N)r� r? �__iadd__r �extend)r� �itemseqr r r rO / s
zParseResults.extendc C s | j dd�= | j�� dS )z7
Clear all elements and results names.
N)r r �clear)r� r r r rQ B s zParseResults.clearc C s" y| | S t k
r dS X d S )Nr� )r )r� r r r r r� I s zParseResults.__getattr__c C s | � � }||7 }|S )N)�copy)r� �otherr� r r r �__add__O s zParseResults.__add__c s� |j rnt| j���fdd�� |j �� }� fdd�|D �}x4|D ],\}}|| |< t|d t�r>t| �|d _q>W | j|j7 _| j� |j� | S )Nc s | dk r � S | � S )Nr r )�a)�offsetr r r� W r� z'ParseResults.__iadd__.<locals>.<lambda>c s4 g | ],\}}|D ] }|t |d � |d ��f�qqS )r r� )r )r r& �vlistr# )� addoffsetr r r Y s z)ParseResults.__iadd__.<locals>.<listcomp>r )
r r� r r, r� r? r% r r �update)r� rS �
otheritems�otherdictitemsr& r# r )rX rV r rN T s
zParseResults.__iadd__c C s& t |t�r|dkr| �� S || S d S )Nr )r� r� rR )r� rS r r r �__radd__d s zParseResults.__radd__c C s dt | j�t | j�f S )Nz(%s, %s))r r r )r� r r r r� l s zParseResults.__repr__c C s dd� dd� | jD �� d S )N�[z, c s s( | ] }t |t�rt|�nt|�V qd S )N)r� r? r� r )r r� r r r r� p s z'ParseResults.__str__.<locals>.<genexpr>�])r� r )r� r r r r� o s zParseResults.__str__r� c C sP g }xF| j D ]<}|r"|r"|�|� t|t�r:||�� 7 }q |�t|�� q W |S )N)r r� r� r? �
_asStringListr� )r� �sep�outrM r r r r_ r s
zParseResults._asStringListc C s dd� | j D �S )ax
Returns the parse results as a nested list of matching tokens, all converted to strings.
Example::
patt = OneOrMore(Word(alphas))
result = patt.parseString("sldkj lsdkj sldkj")
# even though the result prints in string-like form, it is actually a pyparsing ParseResults
print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
# Use asList() to create an actual list
result_list = result.asList()
print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
c S s" g | ]}t |t�r|�� n|�qS r )r� r? r )r �resr r r r � s z'ParseResults.asList.<locals>.<listcomp>)r )r� r r r r } s zParseResults.asListc s6 t r | j}n| j}� fdd�� t� fdd�|� D ��S )a�
Returns the named parse results as a nested dictionary.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
result = date_str.parseString('12/31/1999')
print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
result_dict = result.asDict()
print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
# even though a ParseResults supports dict-like access, sometime you just need to have a dict
import json
print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
c s6 t | t�r.| �� r| �� S � fdd�| D �S n| S d S )Nc s g | ] }� |��qS r r )r r# )�toItemr r r � s z7ParseResults.asDict.<locals>.toItem.<locals>.<listcomp>)r� r? rC �asDict)r� )rc r r rc � s
z#ParseResults.asDict.<locals>.toItemc 3 s | ]\}}|� |�fV qd S )Nr )r r& r# )rc r r r� � s z&ParseResults.asDict.<locals>.<genexpr>)�PY_3r, rB r )r� �item_fnr )rc r rd � s
zParseResults.asDictc C s< t | j�}t| j�� �|_| j|_|j�| j� | j|_|S )zG
Returns a new copy of a :class:`ParseResults` object.
) r? r r r r, r r rY r )r� r� r r r rR � s
zParseResults.copyFc C sP d}g }t dd� | j�� D ��}|d }|s8d}d}d}d} |dk rJ|} n | jrV| j} | sf|rbdS d} |||d| d g7 }x�t| j�D ]�\}
} t| t�r�|
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(Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
r� c s s( | ] \}}|D ]}|d |fV qqdS )r� Nr )r r& rW r# r r r r� � s z%ParseResults.asXML.<locals>.<genexpr>z r� N�ITEM�<�>z</) r r r, r r� r r� r? �asXMLr� r� r� )r� �doctag�namedItemsOnly�indent� formatted�nlra �
namedItems�nextLevelIndent�selfTagr� rb �resTag� xmlBodyTextr r r rj � sT
zParseResults.asXMLc C s: x4| j �� D ]&\}}x |D ]\}}||kr|S qW q W d S )N)r r, )r� r' r& rW r# r� r r r �__lookup� s
zParseResults.__lookupc C s� | j r | j S | jr.| �� }|r(|�| �S dS nNt| �dkrxt| j�dkrxtt| j�� ��d d dkrxtt| j�� ��S dS dS )a
Returns the results name for this token expression. Useful when several
different expressions might match at a particular location.
Example::
integer = Word(nums)
ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
house_number_expr = Suppress('#') + Word(nums, alphanums)
user_data = (Group(house_number_expr)("house_number")
| Group(ssn_expr)("ssn")
| Group(integer)("age"))
user_info = OneOrMore(user_data)
result = user_info.parseString("22 111-22-3333 #221B")
for item in result:
print(item.getName(), ':', item[0])
prints::
age : 22
ssn : 111-22-3333
house_number : 221B
Nr� r )r r� ) r r �_ParseResults__lookupr� r �nextr7 rA r? )r� �parr r r �getName s
zParseResults.getNamer c C s~ g }d}|r$|� |t| �� � � n
|� d� |�rt| �� r�tdd� | �� D ��}x�|D ]x\}} |rn|� |� |� d|d| |f � t| t�r�| r�|� | j||||d d�� q�|� t| �� qX|� t | �� qXW n�t
d d� | D ���rt| } x�t | �D ]x\}
} t| t��rF|� d
|d| |
|d|d | j||||d d�f � q�|� d
|d| |
|d|d t| �f � q�W d� |�S ) aF
Diagnostic method for listing out the contents of
a :class:`ParseResults`. Accepts an optional ``indent`` argument so
that this string can be embedded in a nested display of other data.
Example::
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
result = date_str.parseString('12/31/1999')
print(result.dump())
prints::
['12', '/', '31', '/', '1999']
- day: 1999
- month: 31
- year: 12
r� r� c s s | ]\}}t |�|fV qd S )N)r� )r r& r# r r r r� G s z$ParseResults.dump.<locals>.<genexpr>z
%s%s- %s: z r� )rm �full� include_list�_depthc s s | ]}t |t�V qd S )N)r� r? )r �vvr r r r� S s z
%s%s[%d]:
%s%s%s)
r� r� r rC �sortedr, r� r? �dumpr �anyr� r� ) r� rm rz r{ r| ra �NLr, r& r# r� r} r r r r ) sJ
zParseResults.dumpc O s t j | �� f|�|� dS )a#
Pretty-printer for parsed results as a list, using the
`pprint <https://docs.python.org/3/library/pprint.html>`_ module.
Accepts additional positional or keyword args as defined for
`pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
Example::
ident = Word(alphas, alphanums)
num = Word(nums)
func = Forward()
term = ident | num | Group('(' + func + ')')
func <<= ident + Group(Optional(delimitedList(term)))
result = func.parseString("fna a,b,(fnb c,d,200),100")
result.pprint(width=40)
prints::
['fna',
['a',
'b',
['(', 'fnb', ['c', 'd', '200'], ')'],
'100']]
N)�pprintr )r� r� rE r r r r� j s zParseResults.pprintc C s. | j | j�� | jd k r | �� p d | j| jffS )N)r r rR r r r )r� r r r � __getstate__� s
zParseResults.__getstate__c C sN |d | _ |d \| _}}| _i | _| j�|� |d k rDt|�| _nd | _d S )Nr r� )r r r r rY r% r )r� �staterx � inAccumNamesr r r � __setstate__� s
zParseResults.__setstate__c C s | j | j| j| jfS )N)r r r r )r� r r r �__getnewargs__� s zParseResults.__getnewargs__c C s t t| ��t| �� � S )N)r� r� r r? )r� r r r r� � s zParseResults.__dir__c C sv dd� }| g �}xJ|� � D ]>\}}t|t�r@|| j||d�7 }q|| |g|||�d�7 }qW |dk rr| |g|d�}|S )z�
Helper classmethod to construct a ParseResults from a dict, preserving the
name-value relations as results names. If an optional 'name' argument is
given, a nested ParseResults will be returned
c S sF y t | � W n tk
r dS X tr6t| ttf� S t| t� S d S )NF)r7 � Exceptionre r� r� �bytesr )r� r r r � is_iterable� s z+ParseResults.from_dict.<locals>.is_iterable)r )r r N)r, r� r � from_dict)r� rS r r� r� r& r# r r r r� � s
zParseResults.from_dict)NNTT)N)r� )NFr� T)r� TTr )N)6r r r r� r r� r� r
r( r3 r4 r5 r6 � __nonzero__r8 r9 r< r= r> re r? rA r, r: r@ rB rC rH r� rK r� rO rQ r� rT rN r\ r� r� r_ r rd rR rj rv ry r r� r� r� r� r� r� r� r r r r r? � sl *
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c C sF |}d| k r t |�k r4n n|| d dkr4dS | |�dd| � S )a� Returns current column within a string, counting newlines as line separators.
The first column is number 1.
Note: the default parsing behavior is to expand tabs in the input string
before starting the parsing process. See
:class:`ParserElement.parseString` for more
information on parsing strings containing ``<TAB>`` s, and suggested
methods to maintain a consistent view of the parsed string, the parse
location, and line and column positions within the parsed string.
r r� r� )r� �rfind)r� �strgr� r r r rW � s c C s |� dd| �d S )a� Returns current line number within a string, counting newlines as line separators.
The first line is number 1.
Note - the default parsing behavior is to expand tabs in the input string
before starting the parsing process. See :class:`ParserElement.parseString`
for more information on parsing strings containing ``<TAB>`` s, and
suggested methods to maintain a consistent view of the parsed string, the
parse location, and line and column positions within the parsed string.
r� r r� )�count)r� r� r r r rh � s
c C sF |� dd| �}|�d| �}|dkr2||d |� S ||d d� S dS )zfReturns the line of text containing loc within a string, counting newlines as line separators.
r� r r� N)r� �find)r� r� �lastCR�nextCRr r r re � s
c C s8 t dt|� d t|� dt|| �t|| �f � d S )NzMatch z at loc z(%d,%d))�printr� rh rW )�instringr� �exprr r r �_defaultStartDebugAction� s r� c C s$ t dt|� d t|�� � � d S )NzMatched z -> )r� r� r� r )r� �startloc�endlocr� �toksr r r �_defaultSuccessDebugAction� s r� c C s t dt|� � d S )NzException raised:)r� r� )r� r� r� r� r r r � _defaultExceptionDebugAction� s r� c G s dS )zG'Do-nothing' debug action, to suppress debugging output during parsing.Nr )r� r r r ro � s r� c s� �t kr�fdd�S dg�dg�td d� dkrFddd�}dd d
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r� t��}Y nX ||_|S )Nc s � |�S )Nr )r� r� r� )�funcr r r� r� z _trim_arity.<locals>.<lambda>r Fr� )r� � c S s8 t dkr dnd}tj| | d d�| }|d d� gS )N)r� r� r ������r� )�limitr� )�system_version� traceback�
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r� Y nX X �d �kr��d d7 < w� Y qX qW d S )Nr Tr� r� )r� r� )r! r� �exc_info� NameError)r� r� r� )r� �
foundArityr� r� �maxargs�pa_call_line_synthr r r� ! s( z _trim_arity.<locals>.wrapperz<parse action>r � __class__)r )r ) �singleArgBuiltinsr� r� r� r� �getattrr r� r� )r� r� r� � LINE_DIFF� this_liner� � func_namer )r� r� r� r� r� r� r r� s*
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d�dd�Zd�dd�Zd�dd�Zdd� Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd�d#d$�Zd%d&� Zd�d'd(�Zd)d*� Zd+d,� ZG d-d.� d.e �Z e d/k � r�G d0d1� d1e �Z nG d2d1� d1e �Z i Z e!� Z"d3d3gZ#d�d4d5�Z$eZ%ed6d7� �Z&dZ'ed�d9d:��Z(d�d;d<�Z)e*dfd=d>�Z+d?d@� Z,e*fdAdB�Z-e*dfdCdD�Z.dEdF� Z/dGdH� Z0dIdJ� Z1dKdL� Z2dMdN� Z3dOdP� Z4dQdR� Z5dSdT� Z6dUdV� Z7dWdX� Z8dYdZ� Z9d[d\� Z:d]d^� Z;d_d`� Z<dadb� Z=d�dcdd�Z>dedf� Z?dgdh� Z@didj� ZAdkdl� ZBdmdn� ZCdodp� ZDd�dqdr�ZEdsdt� ZFdudv� ZGdwdx� ZHdydz� ZId�d{d|�ZJd�d}d~�ZKdd�� ZLd�d�� ZMd�d�� ZNd�d�� ZOd�d�� ZPd�d�d��ZQd�d�d��ZRd/S )�rA z)Abstract base level parser element class.z
Fc C s
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Overrides the default whitespace chars
Example::
# default whitespace chars are space, <TAB> and newline
OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl']
# change to just treat newline as significant
ParserElement.setDefaultWhitespaceChars(" \t")
OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def']
N)rA �DEFAULT_WHITE_CHARS)�charsr r r �setDefaultWhitespaceCharsL s z'ParserElement.setDefaultWhitespaceCharsc C s
| t _dS )ah
Set class to be used for inclusion of string literals into a parser.
Example::
# default literal class used is Literal
integer = Word(nums)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31']
# change to Suppress
ParserElement.inlineLiteralsUsing(Suppress)
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
date_str.parseString("1999/12/31") # -> ['1999', '12', '31']
N)rA �_literalStringClass)r� r r r �inlineLiteralsUsing\ s z!ParserElement.inlineLiteralsUsingc C s x|j r|j }qW |S )N)�tb_next)r� r� r r r �_trim_tracebackr s
z ParserElement._trim_tracebackc C s� t � | _d | _d | _d | _|| _d| _ttj �| _
d| _ d| _ d| _
t � | _d| _d| _d| _d| _d| _d| _d | _d| _d| _d S )NTFr� )NNN)r � parseAction�
failAction�strRepr� resultsName�
saveAsList�skipWhitespacer� rA r� �
whiteChars�copyDefaultWhiteChars�mayReturnEmpty�keepTabs� ignoreExprs�debug� streamlined�
mayIndexError�errmsg� modalResults� debugActionsr� � callPreparse�
callDuringTry)r� �savelistr r r r� x s( zParserElement.__init__c C s< t � | �}| jdd� |_| jdd� |_| jr8tj|_|S )a/
Make a copy of this :class:`ParserElement`. Useful for defining
different parse actions for the same parsing pattern, using copies of
the original parse element.
Example::
integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
integerK = integer.copy().addParseAction(lambda toks: toks[0] * 1024) + Suppress("K")
integerM = integer.copy().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
prints::
[5120, 100, 655360, 268435456]
Equivalent form of ``expr.copy()`` is just ``expr()``::
integerM = integer().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
N)rR r� r� r� rA r� r� )r� �cpyr r r rR � s
zParserElement.copyc C s$ || _ d| j | _tjr | �� | S )a_
Define name for this expression, makes debugging and exception messages clearer.
Example::
Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
Word(nums).setName("integer").parseString("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1)
z Expected )r r� r �!enable_debug_on_named_expressions�setDebug)r� r r r r �setName� s
zParserElement.setNamec C s | � ||�S )aO
Define name for referencing matching tokens as a nested attribute
of the returned parse results.
NOTE: this returns a *copy* of the original :class:`ParserElement` object;
this is so that the client can define a basic element, such as an
integer, and reference it in multiple places with different names.
You can also set results names using the abbreviated syntax,
``expr("name")`` in place of ``expr.setResultsName("name")``
- see :class:`__call__`.
Example::
date_str = (integer.setResultsName("year") + '/'
+ integer.setResultsName("month") + '/'
+ integer.setResultsName("day"))
# equivalent form:
date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
)�_setResultsName)r� r �listAllMatchesr r r �setResultsName� s z ParserElement.setResultsNamec C s4 | � � }|�d�r"|d d� }d}||_| |_|S )N�*r� T)rR �endswithr� r� )r� r r� �newselfr r r r� � s
z ParserElement._setResultsNameTc s@ |r&| j � d� fdd� }� |_|| _ nt| j d�r<| j j| _ | S )z�Method to invoke the Python pdb debugger when this element is
about to be parsed. Set ``breakFlag`` to True to enable, False to
disable.
Tc s dd l }|�� � | |||�S )Nr )�pdb� set_trace)r� r� � doActions� callPreParser� )� _parseMethodr r �breaker� s z'ParserElement.setBreak.<locals>.breaker�_originalParseMethod)TT)�_parser� r; )r� � breakFlagr� r )r� r �setBreak� s
zParserElement.setBreakc O sV t |�dgkrg | _n<tdd� |D ��s0td��t ttt |���| _|�dd�| _| S )a�
Define one or more actions to perform when successfully matching parse element definition.
Parse action fn is a callable method with 0-3 arguments, called as ``fn(s, loc, toks)`` ,
``fn(loc, toks)`` , ``fn(toks)`` , or just ``fn()`` , where:
- s = the original string being parsed (see note below)
- loc = the location of the matching substring
- toks = a list of the matched tokens, packaged as a :class:`ParseResults` object
If the functions in fns modify the tokens, they can return them as the return
value from fn, and the modified list of tokens will replace the original.
Otherwise, fn does not need to return any value.
If None is passed as the parse action, all previously added parse actions for this
expression are cleared.
Optional keyword arguments:
- callDuringTry = (default= ``False``) indicate if parse action should be run during lookaheads and alternate testing
Note: the default parsing behavior is to expand tabs in the input string
before starting the parsing process. See :class:`parseString for more
information on parsing strings containing ``<TAB>`` s, and suggested
methods to maintain a consistent view of the parsed string, the parse
location, and line and column positions within the parsed string.
Example::
integer = Word(nums)
date_str = integer + '/' + integer + '/' + integer
date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31']
# use parse action to convert to ints at parse time
integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
date_str = integer + '/' + integer + '/' + integer
# note that integer fields are now ints, not strings
date_str.parseString("1999/12/31") # -> [1999, '/', 12, '/', 31]
Nc s s | ]}t |�V qd S )N)�callable)r r� r r r r� s z/ParserElement.setParseAction.<locals>.<genexpr>z parse actions must be callabler� F)r r� �allr! �mapr� r� r� )r� �fnsrE r r r r� � s (z ParserElement.setParseActionc O s4 | j tttt|���7 _ | jp,|�dd�| _| S )z�
Add one or more parse actions to expression's list of parse actions. See :class:`setParseAction`.
See examples in :class:`copy`.
r� F)r� r r� r� r� r� )r� r� rE r r r �addParseAction s z ParserElement.addParseActionc
O sJ x0|D ](}| j �t||�d�|�dd�d�� qW | jpB|�dd�| _| S )a� Add a boolean predicate function to expression's list of parse actions. See
:class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
functions passed to ``addCondition`` need to return boolean success/fail of the condition.
Optional keyword arguments:
- message = define a custom message to be used in the raised exception
- fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
Example::
integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
year_int = integer.copy()
year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
date_str = year_int + '/' + integer + '/' + integer
result = date_str.parseString("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
r� r� F)r� r� r� )r� r� r� r� r� )r� r� rE r� r r r � addCondition) s
zParserElement.addConditionc C s
|| _ | S )a Define action to perform if parsing fails at this expression.
Fail acton fn is a callable function that takes the arguments
``fn(s, loc, expr, err)`` where:
- s = string being parsed
- loc = location where expression match was attempted and failed
- expr = the parse expression that failed
- err = the exception thrown
The function returns no value. It may throw :class:`ParseFatalException`
if it is desired to stop parsing immediately.)r� )r� r� r r r �
setFailActionB s
zParserElement.setFailActionc C sZ d}xP|rTd}xB| j D ]8}y x|�||�\}}d}q W W q tk
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exprsFound�e�dummyr r r �_skipIgnorablesO s z ParserElement._skipIgnorablesc C sL | j r| �||�}| jrH| j}t|�}x ||k rF|| |krF|d7 }q(W |S )Nr� )r� r� r� r� r� )r� r� r� �wt�instrlenr r r �preParse\ s zParserElement.preParsec C s |g fS )Nr )r� r� r� r� r r r r� h s zParserElement.parseImplc C s |S )Nr )r� r� r� � tokenlistr r r � postParsek s zParserElement.postParsec C s� d\}}}| j }|s | j�r"| j| r8| j| ||| � y�|rR| jrR| �||�} n|} | }
| jsl| t|�kr�y| �|| |�\}} W q� tk
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fS )N)r r� r� )r r z exception raised in parse action)r� r� r� r� r� r� r� r� r" r< r� r� r� r? r� r� r� r� r� � __cause__r� r )r� r� r� r� r� �TRY�MATCH�FAIL� debugging�preloc� tokensStart�tokens�err� retTokensr� �parse_action_excr� r r r r� o s�
zParserElement._parseNoCachec C s> y| j ||dd�d S tk
r8 t||| j| ��Y nX d S )NF)r� r )r� r> r< r� )r� r� r� r r r �tryParse� s zParserElement.tryParsec C s2 y| � ||� W n ttfk
r( dS X dS d S )NFT)r� r< r" )r� r� r� r r r � canParseNext� s
zParserElement.canParseNextc @ s e Zd Zdd� ZdS )z ParserElement._UnboundedCachec s~ i � t � | _�� �fdd�}� fdd�}� fdd�}� fdd�}t�|| �| _t�|| �| _t�|| �| _t�|| �| _d S ) Nc s � � |��S )N)r� )r� rI )�cache� not_in_cacher r r� � s z3ParserElement._UnboundedCache.__init__.<locals>.getc s |� |< d S )Nr )r� rI r1 )r r r r� � s z3ParserElement._UnboundedCache.__init__.<locals>.setc s � � � d S )N)rQ )r� )r r r rQ � s z5ParserElement._UnboundedCache.__init__.<locals>.clearc s t � �S )N)r� )r� )r r r � cache_len� s z9ParserElement._UnboundedCache.__init__.<locals>.cache_len)r
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r � _OrderedDictr r r� r� rQ r5 )r� r r� r� rQ r r )r r r r r� � s z!ParserElement._FifoCache.__init__N)r r r r� r r r r �
_FifoCache� s r c @ s e Zd Zdd� ZdS )zParserElement._FifoCachec s� t � | _�i � t�g ���� �fdd�}� ��fdd�}� �fdd�}� fdd�}t�|| �| _t�|| �| _t�|| �| _t�|| �| _ d S ) Nc s � � |��S )N)r� )r� rI )r r r r r� s z.ParserElement._FifoCache.__init__.<locals>.getc s8 |� |< x t ���kr(� ���� d � q
W ��|� d S )N)r� rH �popleftr� )r� rI r1 )r �key_fifor r r r� s z.ParserElement._FifoCache.__init__.<locals>.setc s � � � �� � d S )N)rQ )r� )r r r r rQ s z0ParserElement._FifoCache.__init__.<locals>.clearc s t � �S )N)r� )r� )r r r r s z4ParserElement._FifoCache.__init__.<locals>.cache_len)
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r � collections�dequer r r� r� rQ r5 )r� r r� r� rQ r r )r r r r r r� s z!ParserElement._FifoCache.__init__N)r r r r� r r r r r s r c C s� d\}}| ||||f}t j�� t j}|�|�} | |jkr�t j| d7 < y| �||||�} W n8 tk
r� }
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�r�| �| d | d � � fS W d Q R X d S )N)r r� r� r )rA �packrat_cache_lock�
packrat_cacher� r �packrat_cache_statsr� r: r� r� r� rR r� r� ) r� r� r� r� r� �HIT�MISS�lookupr r1 r� r r r � _parseCache+ s$
zParserElement._parseCachec C s( t j�� dgtt j� t jd d �< d S )Nr )rA r rQ r� r r r r r �
resetCacheD s
zParserElement.resetCache� c C s8 t js4dt _| dkr t �� t _n t �| �t _t jt _dS )a� Enables "packrat" parsing, which adds memoizing to the parsing logic.
Repeated parse attempts at the same string location (which happens
often in many complex grammars) can immediately return a cached value,
instead of re-executing parsing/validating code. Memoizing is done of
both valid results and parsing exceptions.
Parameters:
- cache_size_limit - (default= ``128``) - if an integer value is provided
will limit the size of the packrat cache; if None is passed, then
the cache size will be unbounded; if 0 is passed, the cache will
be effectively disabled.
This speedup may break existing programs that use parse actions that
have side-effects. For this reason, packrat parsing is disabled when
you first import pyparsing. To activate the packrat feature, your
program must call the class method :class:`ParserElement.enablePackrat`.
For best results, call ``enablePackrat()`` immediately after
importing pyparsing.
Example::
from pip._vendor import pyparsing
pyparsing.ParserElement.enablePackrat()
TN)rA �_packratEnabledr r r r r� )�cache_size_limitr r r �
enablePackratJ s zParserElement.enablePackratc
C s� t �� | js| �� x| jD ] }|�� q W | js<|�� }y<| �|d�\}}|rv| �||�}t � t
� }|�||� W nN t k
r� } z0t j r�� n"t
|dd�dk r�| �|j�|_|�W dd}~X Y nX |S dS )a�
Execute the parse expression with the given string.
This is the main interface to the client code, once the complete
expression has been built.
Returns the parsed data as a :class:`ParseResults` object, which may be
accessed as a list, or as a dict or object with attributes if the given parser
includes results names.
If you want the grammar to require that the entire input string be
successfully parsed, then set ``parseAll`` to True (equivalent to ending
the grammar with ``StringEnd()``).
Note: ``parseString`` implicitly calls ``expandtabs()`` on the input string,
in order to report proper column numbers in parse actions.
If the input string contains tabs and
the grammar uses parse actions that use the ``loc`` argument to index into the
string being parsed, you can ensure you have a consistent view of the input
string by:
- calling ``parseWithTabs`` on your grammar before calling ``parseString``
(see :class:`parseWithTabs`)
- define your parse action using the full ``(s, loc, toks)`` signature, and
reference the input string using the parse action's ``s`` argument
- explictly expand the tabs in your input string before calling
``parseString``
Example::
Word('a').parseString('aaaaabaaa') # -> ['aaaaa']
Word('a').parseString('aaaaabaaa', parseAll=True) # -> Exception: Expected end of text
r r� N)rA r r� �
streamliner� r� �
expandtabsr� r� r) rF r: �verbose_stacktracer� r� r� )r� r� �parseAllr� r� r� �ser� r r r � parseStringm s( ! zParserElement.parseStringc
c sb | j s| �� x| jD ] }|�� qW | js8t|��� }t|�}d}| j}| j}t �
� d} y�x�||k�r| |k �ry |||�}
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d }q`W W nT t k
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�r(� n$t|dd�dk �rH| �|j�|_|�W dd}~X Y nX dS )aq
Scan the input string for expression matches. Each match will return the
matching tokens, start location, and end location. May be called with optional
``maxMatches`` argument, to clip scanning after 'n' matches are found. If
``overlap`` is specified, then overlapping matches will be reported.
Note that the start and end locations are reported relative to the string
being parsed. See :class:`parseString` for more information on parsing
strings with embedded tabs.
Example::
source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
print(source)
for tokens, start, end in Word(alphas).scanString(source):
print(' '*start + '^'*(end-start))
print(' '*start + tokens[0])
prints::
sldjf123lsdjjkf345sldkjf879lkjsfd987
^^^^^
sldjf
^^^^^^^
lsdjjkf
^^^^^^
sldkjf
^^^^^^
lkjsfd
r F)r� r� r� N)r� r r� r� r� r r� r� r� rA r r< r: r r� r� r� )r� r� �
maxMatches�overlapr� r� r� �
preparseFn�parseFn�matchesr� �nextLocr� �nextlocr� r r r �
scanString� sF
zParserElement.scanStringc
C s g }d}d| _ y�xh| �|�D ]Z\}}}|�|||� � |rrt|t�rT||�� 7 }n t|t�rh||7 }n
|�|� |}q W |�||d� � dd� |D �}d�tt t
|���S t k
r� } z0t j
rȂ n"t|dd�dk r�| �|j�|_|�W dd}~X Y nX dS )a[
Extension to :class:`scanString`, to modify matching text with modified tokens that may
be returned from a parse action. To use ``transformString``, define a grammar and
attach a parse action to it that modifies the returned token list.
Invoking ``transformString()`` on a target string will then scan for matches,
and replace the matched text patterns according to the logic in the parse
action. ``transformString()`` returns the resulting transformed string.
Example::
wd = Word(alphas)
wd.setParseAction(lambda toks: toks[0].title())
print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
prints::
Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
r TNc S s g | ] }|r|�qS r r )r �or r r r s z1ParserElement.transformString.<locals>.<listcomp>r� r� )r� r' r� r� r? r r r� r� r� �_flattenr: rA r r� r� r� )r� r� ra �lastEr� r� r� r� r r r r� � s,
z ParserElement.transformStringc
C sn yt dd� | �||�D ��S tk
rh } z0tjr6� n"t|dd�dk rT| �|j�|_|�W dd}~X Y nX dS )a�
Another extension to :class:`scanString`, simplifying the access to the tokens found
to match the given parse expression. May be called with optional
``maxMatches`` argument, to clip searching after 'n' matches are found.
Example::
# a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
cap_word = Word(alphas.upper(), alphas.lower())
print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
# the sum() builtin can be used to merge results into a single ParseResults object
print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
prints::
[['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
c S s g | ]\}}}|�qS r r )r r� r� r� r r r r 7 s z.ParserElement.searchString.<locals>.<listcomp>r� N)r? r' r: rA r r� r� r� )r� r� r r� r r r � searchString! s zParserElement.searchStringc c sX d}d}x<| j ||d�D ]*\}}}|||� V |r>|d V |}qW ||d� V dS )aR
Generator method to split a string using the given expression as a separator.
May be called with optional ``maxsplit`` argument, to limit the number of splits;
and the optional ``includeSeparators`` argument (default= ``False``), if the separating
matching text should be included in the split results.
Example::
punc = oneOf(list(".,;:/-!?"))
print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
prints::
['This', ' this', '', ' this sentence', ' is badly punctuated', '']
r )r N)r' ) r� r� �maxsplit�includeSeparators�splits�lastr� r� r� r r r r� A s
zParserElement.splitc C sV |t krt| �S t|t�r$| �|�}t|t�sJtjdt|� t dd� dS t
| |g�S )a[
Implementation of + operator - returns :class:`And`. Adding strings to a ParserElement
converts them to :class:`Literal`s by default.
Example::
greet = Word(alphas) + "," + Word(alphas) + "!"
hello = "Hello, World!"
print (hello, "->", greet.parseString(hello))
prints::
Hello, World! -> ['Hello', ',', 'World', '!']
``...`` may be used as a parse expression as a short form of :class:`SkipTo`.
Literal('start') + ... + Literal('end')
is equivalent to:
Literal('start') + SkipTo('end')("_skipped*") + Literal('end')
Note that the skipped text is returned with '_skipped' as a results name,
and to support having multiple skips in the same parser, the value returned is
a list of all skipped text.
z4Cannot combine element of type %s with ParserElementr� )�
stacklevelN) �Ellipsis� _PendingSkipr� r r� rA �warnings�warnr� �
SyntaxWarningr" )r� rS r r r rT Z s
zParserElement.__add__c C sZ |t krt| �d�| S t|t�r,| �|�}t|t�sRtjdt|� t dd� dS || S )z`
Implementation of + operator when left operand is not a :class:`ParserElement`
z _skipped*z4Cannot combine element of type %s with ParserElementr� )r0 N)
r1 rE r� r r� rA r3 r4 r� r5 )r� rS r r r r\ � s
zParserElement.__radd__c C sJ t |t�r| �|�}t |t�s:tjdt|� tdd� dS | t� � | S )zT
Implementation of - operator, returns :class:`And` with error stop
z4Cannot combine element of type %s with ParserElementr� )r0 N)
r� r r� rA r3 r4 r� r5 r" �
_ErrorStop)r� rS r r r �__sub__� s
zParserElement.__sub__c C sB t |t�r| �|�}t |t�s:tjdt|� tdd� dS || S )z`
Implementation of - operator when left operand is not a :class:`ParserElement`
z4Cannot combine element of type %s with ParserElementr� )r0 N)r� r r� rA r3 r4 r� r5 )r� rS r r r �__rsub__� s
zParserElement.__rsub__c s |t krd}n8t|t�rF|dd� t fkrFd|dd� d dd� }t|t�r\|d }}n�t|t��rJtdd � |D ��}|d
dd� }|d dkr�d|d f}t|d t�r�|d dkr�|d dkr�t��S |d dkr�t��S �|d t�� S nNt|d t��r,t|d t��r,|\}}||8 }n td t|d �t|d ���ntd t|���|dk �rjtd
��|dk �r|td��|| k�r�dk�r�n ntd��|�r� �fdd�� |�r�|dk�r҈� |� }nt �g| �� |� }n� |�}n |dk�r�}nt �g| �}|S )a�
Implementation of * operator, allows use of ``expr * 3`` in place of
``expr + expr + expr``. Expressions may also me multiplied by a 2-integer
tuple, similar to ``{min, max}`` multipliers in regular expressions. Tuples
may also include ``None`` as in:
- ``expr*(n, None)`` or ``expr*(n, )`` is equivalent
to ``expr*n + ZeroOrMore(expr)``
(read as "at least n instances of ``expr``")
- ``expr*(None, n)`` is equivalent to ``expr*(0, n)``
(read as "0 to n instances of ``expr``")
- ``expr*(None, None)`` is equivalent to ``ZeroOrMore(expr)``
- ``expr*(1, None)`` is equivalent to ``OneOrMore(expr)``
Note that ``expr*(None, n)`` does not raise an exception if
more than n exprs exist in the input stream; that is,
``expr*(None, n)`` does not enforce a maximum number of expr
occurrences. If this behavior is desired, then write
``expr*(None, n) + ~expr``
)r NNr� )r )Nr� r c s s | ]}|t k r|nd V qd S )N)r1 )r r( r r r r� � s z(ParserElement.__mul__.<locals>.<genexpr>)NNz8cannot multiply 'ParserElement' and ('%s', '%s') objectsz0cannot multiply 'ParserElement' and '%s' objectsz/cannot multiply ParserElement by negative valuez@second tuple value must be greater or equal to first tuple valuez,cannot multiply ParserElement by 0 or (0, 0)c s( | dkr t �� | d � �S t ��S d S )Nr� )r8 )�n)�makeOptionalListr� r r r: � s z/ParserElement.__mul__.<locals>.makeOptionalList)
r1 r� �tupler� rO r6 r! r� �
ValueErrorr" )r� rS � minElements� optElementsr� r )r: r� r �__mul__� sN
zParserElement.__mul__c C s
| � |�S )N)r? )r� rS r r r �__rmul__� s zParserElement.__rmul__c C sZ |t krt| dd�S t|t�r(| �|�}t|t�sNtjdt|� t dd� dS t
| |g�S )zL
Implementation of | operator - returns :class:`MatchFirst`
T)� must_skipz4Cannot combine element of type %s with ParserElementr� )r0 N) r1 r2 r� r r� rA r3 r4 r� r5 r3 )r� rS r r r �__or__� s
zParserElement.__or__c C sB t |t�r| �|�}t |t�s:tjdt|� tdd� dS || B S )z`
Implementation of | operator when left operand is not a :class:`ParserElement`
z4Cannot combine element of type %s with ParserElementr� )r0 N)r� r r� rA r3 r4 r� r5 )r� rS r r r �__ror__ s
zParserElement.__ror__c C sF t |t�r| �|�}t |t�s:tjdt|� tdd� dS t| |g�S )zD
Implementation of ^ operator - returns :class:`Or`
z4Cannot combine element of type %s with ParserElementr� )r0 N) r� r r� rA r3 r4 r� r5 r9 )r� rS r r r �__xor__ s
zParserElement.__xor__c C sB t |t�r| �|�}t |t�s:tjdt|� tdd� dS || A S )z`
Implementation of ^ operator when left operand is not a :class:`ParserElement`
z4Cannot combine element of type %s with ParserElementr� )r0 N)r� r r� rA r3 r4 r� r5 )r� rS r r r �__rxor__ s
zParserElement.__rxor__c C sF t |t�r| �|�}t |t�s:tjdt|� tdd� dS t| |g�S )zF
Implementation of & operator - returns :class:`Each`
z4Cannot combine element of type %s with ParserElementr� )r0 N) r� r r� rA r3 r4 r� r5 r( )r� rS r r r �__and__' s
zParserElement.__and__c C sB t |t�r| �|�}t |t�s:tjdt|� tdd� dS || @ S )z`
Implementation of & operator when left operand is not a :class:`ParserElement`
z4Cannot combine element of type %s with ParserElementr� )r0 N)r� r r� rA r3 r4 r� r5 )r� rS r r r �__rand__3 s
zParserElement.__rand__c C s t | �S )zH
Implementation of ~ operator - returns :class:`NotAny`
)r5 )r� r r r �
__invert__? s zParserElement.__invert__c C s t d| jj ��d S )Nz%r object is not iterable)r! r� r )r� r r r r8 E s zParserElement.__iter__c C s� y t |t�r|f}t|� W n tk
r8 ||f}Y nX t|�dkrzt�d�|dd� t|�dkrrd�t|��nd�� | t|dd� � }|S )a�
use ``[]`` indexing notation as a short form for expression repetition:
- ``expr[n]`` is equivalent to ``expr*n``
- ``expr[m, n]`` is equivalent to ``expr*(m, n)``
- ``expr[n, ...]`` or ``expr[n,]`` is equivalent
to ``expr*n + ZeroOrMore(expr)``
(read as "at least n instances of ``expr``")
- ``expr[..., n]`` is equivalent to ``expr*(0, n)``
(read as "0 to n instances of ``expr``")
- ``expr[...]`` and ``expr[0, ...]`` are equivalent to ``ZeroOrMore(expr)``
- ``expr[1, ...]`` is equivalent to ``OneOrMore(expr)``
``None`` may be used in place of ``...``.
Note that ``expr[..., n]`` and ``expr[m, n]``do not raise an exception
if more than ``n`` ``expr``s exist in the input stream. If this behavior is
desired, then write ``expr[..., n] + ~expr``.
r� z.only 1 or 2 index arguments supported ({0}{1})Nr� z ... [{0}]r� ) r� r� r7 r! r� r3 r4 r� r; )r� rI r� r r r r
J s
"zParserElement.__getitem__c C s |dk r| � |�S | �� S dS )a�
Shortcut for :class:`setResultsName`, with ``listAllMatches=False``.
If ``name`` is given with a trailing ``'*'`` character, then ``listAllMatches`` will be
passed as ``True``.
If ``name` is omitted, same as calling :class:`copy`.
Example::
# these are equivalent
userdata = Word(alphas).setResultsName("name") + Word(nums + "-").setResultsName("socsecno")
userdata = Word(alphas)("name") + Word(nums + "-")("socsecno")
N)r� rR )r� r r r r �__call__n s
zParserElement.__call__c C s t | �S )z�
Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from
cluttering up returned output.
)rH )r� r r r �suppress� s zParserElement.suppressc C s
d| _ | S )a
Disables the skipping of whitespace before matching the characters in the
:class:`ParserElement`'s defined pattern. This is normally only used internally by
the pyparsing module, but may be needed in some whitespace-sensitive grammars.
F)r� )r� r r r �leaveWhitespace� s z ParserElement.leaveWhitespacec C s d| _ || _d| _| S )z8
Overrides the default whitespace chars
TF)r� r� r� )r� r� r r r �setWhitespaceChars� s z ParserElement.setWhitespaceCharsc C s
d| _ | S )z�
Overrides default behavior to expand ``<TAB>``s to spaces before parsing the input string.
Must be called before ``parseString`` when the input grammar contains elements that
match ``<TAB>`` characters.
T)r� )r� r r r �
parseWithTabs� s zParserElement.parseWithTabsc C sL t |t�rt|�}t |t�r4|| jkrH| j�|� n| j�t|�� �� | S )a�
Define expression to be ignored (e.g., comments) while doing pattern
matching; may be called repeatedly, to define multiple comment or other
ignorable patterns.
Example::
patt = OneOrMore(Word(alphas))
patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
patt.ignore(cStyleComment)
patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
)r� r rH r� r� rR )r� rS r r r �ignore� s
zParserElement.ignorec C s" |pt |p t|ptf| _d| _| S )zT
Enable display of debugging messages while doing pattern matching.
T)r� r� r� r� r� )r� � startAction�
successAction�exceptionActionr r r �setDebugActions� s
z ParserElement.setDebugActionsc C s |r| � ttt� nd| _| S )a�
Enable display of debugging messages while doing pattern matching.
Set ``flag`` to True to enable, False to disable.
Example::
wd = Word(alphas).setName("alphaword")
integer = Word(nums).setName("numword")
term = wd | integer
# turn on debugging for wd
wd.setDebug()
OneOrMore(term).parseString("abc 123 xyz 890")
prints::
Match alphaword at loc 0(1,1)
Matched alphaword -> ['abc']
Match alphaword at loc 3(1,4)
Exception raised:Expected alphaword (at char 4), (line:1, col:5)
Match alphaword at loc 7(1,8)
Matched alphaword -> ['xyz']
Match alphaword at loc 11(1,12)
Exception raised:Expected alphaword (at char 12), (line:1, col:13)
Match alphaword at loc 15(1,16)
Exception raised:Expected alphaword (at char 15), (line:1, col:16)
The output shown is that produced by the default debug actions - custom debug actions can be
specified using :class:`setDebugActions`. Prior to attempting
to match the ``wd`` expression, the debugging message ``"Match <exprname> at loc <n>(<line>,<col>)"``
is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"``
message is shown. Also note the use of :class:`setName` to assign a human-readable name to the expression,
which makes debugging and exception messages easier to understand - for instance, the default
name created for the :class:`Word` expression without calling ``setName`` is ``"W:(ABCD...)"``.
F)rR r� r� r� r� )r� �flagr r r r� � s %zParserElement.setDebugc C s | j S )N)r )r� r r r r� � s zParserElement.__str__c C s t | �S )N)r� )r� r r r r� � s zParserElement.__repr__c C s d| _ d | _| S )NT)r� r� )r� r r r r � s zParserElement.streamlinec C s d S )Nr )r� r r r r �checkRecursion� s z ParserElement.checkRecursionc C s | � g � dS )zj
Check defined expressions for valid structure, check for infinite recursive definitions.
N)rT )r� �
validateTracer r r �validate� s zParserElement.validatec C s� y |� � }W n2 tk
r> t|d��}|� � }W dQ R X Y nX y | �||�S tk
r� } z0tjrh� n"t|dd�dk r�| �|j �|_ |�W dd}~X Y nX dS )z�
Execute the parse expression on the given file or filename.
If a filename is specified (instead of a file object),
the entire file is opened, read, and closed before parsing.
�rNr� )
�readr� �openr r: rA r r� r� r� )r� �file_or_filenamer �
file_contents�fr� r r r � parseFile
s zParserElement.parseFilec C s> | |kr dS t |t�r | �|�S t |t�r:t| �t|�kS dS )NTF)r� r r$ rA �vars)r� rS r r r �__eq__
s
zParserElement.__eq__c C s
| |k S )Nr )r� rS r r r �__ne__$
s zParserElement.__ne__c C s t | �S )N)�id)r� r r r �__hash__'
s zParserElement.__hash__c C s | |kS )Nr )r� rS r r r �__req__*
s zParserElement.__req__c C s
| |k S )Nr )r� rS r r r �__rne__-
s zParserElement.__rne__c C s0 y| j t|�|d� dS tk
r* dS X dS )a�
Method for quick testing of a parser against a test string. Good for simple
inline microtests of sub expressions while building up larger parser.
Parameters:
- testString - to test against this expression for a match
- parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
Example::
expr = Word(nums)
assert expr.matches("100")
)r TFN)r r� r: )r� �
testStringr r r r r$ 0
s
zParserElement.matches�#c C s� t |t�r"tttj|�� �� ��}t |t�r4t|�}|dkrBt j
}|j } g }
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d���t�}
d}�xt|D �]j}|dk r�|�|d�s�| r�|s�| �|� qx|s�qx| r�dd�| � nd|g}g } y"|
�|�|��}| j||d�}W n� tk
�r� } z�t |t��rd nd}d|k�rT|�t|j|�� |�d
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t|� � | �o�|} |}W dd}~X Y �n tk
�r� } z$|�dt|� � | �o�|} |}W dd}~X Y n�X | �o�| } |dk �r�yR|||�}|dk �r:t |t ��r*|�|� � � n|�t|�� n|�|� � � W nR tk
�r� } z2|�|j |d�� |�d� |j t |�j |�� W dd}~X Y nX n|�|j |d�� |�r�|�r�|�d� | d�|�� |
�||f� qxW | |
fS )as
Execute the parse expression on a series of test strings, showing each
test, the parsed results or where the parse failed. Quick and easy way to
run a parse expression against a list of sample strings.
Parameters:
- tests - a list of separate test strings, or a multiline string of test strings
- parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
- comment - (default= ``'#'``) - expression for indicating embedded comments in the test
string; pass None to disable comment filtering
- fullDump - (default= ``True``) - dump results as list followed by results names in nested outline;
if False, only dump nested list
- printResults - (default= ``True``) prints test output to stdout
- failureTests - (default= ``False``) indicates if these tests are expected to fail parsing
- postParse - (default= ``None``) optional callback for successful parse results; called as
`fn(test_string, parse_results)` and returns a string to be added to the test output
- file - (default=``None``) optional file-like object to which test output will be written;
if None, will default to ``sys.stdout``
Returns: a (success, results) tuple, where success indicates that all tests succeeded
(or failed if ``failureTests`` is True), and the results contain a list of lines of each
test's output
Example::
number_expr = pyparsing_common.number.copy()
result = number_expr.runTests('''
# unsigned integer
100
# negative integer
-100
# float with scientific notation
6.02e23
# integer with scientific notation
1e-12
''')
print("Success" if result[0] else "Failed!")
result = number_expr.runTests('''
# stray character
100Z
# missing leading digit before '.'
-.100
# too many '.'
3.14.159
''', failureTests=True)
print("Success" if result[0] else "Failed!")
prints::
# unsigned integer
100
[100]
# negative integer
-100
[-100]
# float with scientific notation
6.02e23
[6.02e+23]
# integer with scientific notation
1e-12
[1e-12]
Success
# stray character
100Z
^
FAIL: Expected end of text (at char 3), (line:1, col:4)
# missing leading digit before '.'
-.100
^
FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
# too many '.'
3.14.159
^
FAIL: Expected end of text (at char 4), (line:1, col:5)
Success
Each test string must be on a single line. If you want to test a string that spans multiple
lines, create a test like this::
expr.runTest(r"this is a test\n of strings that spans \n 3 lines")
(Note that this is a raw string literal, you must include the leading 'r'.)
NTz\nr� u Fr� )r z(FATAL)r� r� r� zFAIL: zFAIL-EXCEPTION: )rz z{0} failed: {1}: {2})!r� r r r� r� r� �rstrip�
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allResults�comments�successr� �BOMr� ra �resultr� r� r� �pp_valuer� r r r �runTestsD
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r r r r r r r r r� r r r r �_MAX_INTr' r� r+ r� rT r\ r7 r8 r? r@ rB rC rD rE rF rG rH r8 r
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z_PendingSkip.__init__c s\ t |��d�d�}� jrNdd� }� fdd�}� j|� �|� |� �|�B | S � j| | S )Nz...z _skipped*c S s, | j r| j �� dgkr(| d= | �dd � d S )Nr� r �_skipped)r} r rH )r� r r r rA �
s z'_PendingSkip.__add__.<locals>.must_skipc s< | j �� dd � dgkr8| �d�}dt� j� d | d< d S )Nr� r� r} z missing <ri )r} r rH r r| )r� �skipped)r� r r � show_skip�
s
z'_PendingSkip.__add__.<locals>.show_skip)rE r� rA r| r� )r� rS �skipperrA r r )r� r rT �
s z_PendingSkip.__add__c C s | j S )N)r� )r� r r r r� s z_PendingSkip.__repr__c G s t d��d S )NzBuse of `...` expression without following SkipTo target expression)r� )r� r� r r r r� s z_PendingSkip.parseImpl)F)r r r r� rT r� r� �
__classcell__r r )r� r r2 �
s r2 c s e Zd ZdZ� fdd�Z� ZS )rI zYAbstract :class:`ParserElement` subclass, for defining atomic
matching patterns.
c s t t| �jdd� d S )NF)r� )r{ rI r� )r� )r� r r r� s zToken.__init__)r r r r� r� r� r r )r� r rI s c s e Zd ZdZ� fdd�Z� ZS )r) z'An empty token, will always match.
c s$ t t| ��� d| _d| _d| _d S )Nr) TF)r{ r) r� r r� r� )r� )r� r r r� s zEmpty.__init__)r r r r� r� r� r r )r� r r) s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r4 z#A token that will never match.
c s* t t| ��� d| _d| _d| _d| _d S )Nr4 TFzUnmatchable token)r{ r4 r� r r� r� r� )r� )r� r r r� s
zNoMatch.__init__Tc C s t ||| j| ��d S )N)r< r� )r� r� r� r� r r r r� $ s zNoMatch.parseImpl)T)r r r r� r� r� r� r r )r� r r4 s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r1 a� Token to exactly match a specified string.
Example::
Literal('blah').parseString('blah') # -> ['blah']
Literal('blah').parseString('blahfooblah') # -> ['blah']
Literal('blah').parseString('bla') # -> Exception: Expected "blah"
For case-insensitive matching, use :class:`CaselessLiteral`.
For keyword matching (force word break before and after the matched string),
use :class:`Keyword` or :class:`CaselessKeyword`.
c s� t t| ��� || _t|�| _y|d | _W n* tk
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zLiteral.__init__Tc C s@ || | j kr,|�| j|�r,|| j | jfS t||| j| ��d S )N)r� r r� r� r< r� )r� r� r� r� r r r r� J s zLiteral.parseImpl)T)r r r r� r� r� r� r r )r� r r1 ( s
c @ s e Zd Zddd�ZdS )r� Tc C s0 || | j kr |d | jfS t||| j| ��d S )Nr� )r� r� r< r� )r� r� r� r� r r r r� P s z _SingleCharLiteral.parseImplN)T)r r r r� r r r r r� O s r� c sL e Zd ZdZed Zd� fdd� Zddd �Z� fd
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� Z S )r. a� Token to exactly match a specified string as a keyword, that is,
it must be immediately followed by a non-keyword character. Compare
with :class:`Literal`:
- ``Literal("if")`` will match the leading ``'if'`` in
``'ifAndOnlyIf'``.
- ``Keyword("if")`` will not; it will only match the leading
``'if'`` in ``'if x=1'``, or ``'if(y==2)'``
Accepts two optional constructor arguments in addition to the
keyword string:
- ``identChars`` is a string of characters that would be valid
identifier characters, defaulting to all alphanumerics + "_" and
"$"
- ``caseless`` allows case-insensitive matching, default is ``False``.
Example::
Keyword("start").parseString("start") # -> ['start']
Keyword("start").parseString("starting") # -> Exception
For case-insensitive matching, use :class:`CaselessKeyword`.
z_$NFc s� t t| ��� |d kr tj}|| _t|�| _y|d | _W n$ tk
r^ t j
dt dd� Y nX d| j | _ d| j | _
d| _d| _|| _|r�|�� | _|�� }t|�| _d S )Nr z2null string passed to Keyword; use Empty() insteadr� )r0 z"%s"z Expected F)r{ r. r� �DEFAULT_KEYWORD_CHARSr� r� r� r� r" r3 r4 r5 r r� r� r� �caseless�upper�
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identChars)r� r� r� r� )r� r r r� s s&
zKeyword.__init__Tc C s | j r||||| j � �� | jkr�|t|�| j ksL||| j �� | jkr�|dksj||d �� | jkr�|| j | jfS nv|| | jkr�| jdks�|�| j|�r�|t|�| j ks�||| j | jkr�|dks�||d | jkr�|| j | jfS t ||| j
| ��d S )Nr r� ) r� r� r� r� r� r� r� r� r r< r� )r� r� r� r� r r r r� � s zKeyword.parseImplc s t t| ��� }tj|_|S )N)r{ r. rR r� r� )r� r� )r� r r rR � s z Keyword.copyc C s
| t _dS )z,Overrides the default Keyword chars
N)r. r� )r� r r r �setDefaultKeywordChars� s z Keyword.setDefaultKeywordChars)NF)T) r r r r� rQ r� r� r� rR r r� r� r r )r� r r. X s
c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r$ af Token to match a specified string, ignoring case of letters.
Note: the matched results will always be in the case of the given
match string, NOT the case of the input text.
Example::
OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
(Contrast with example for :class:`CaselessKeyword`.)
c s6 t t| ��|�� � || _d| j | _d| j | _d S )Nz'%s'z Expected )r{ r$ r� r� � returnStringr r� )r� r� )r� r r r� � s zCaselessLiteral.__init__Tc C s@ |||| j � �� | jkr,|| j | jfS t||| j| ��d S )N)r� r� r� r� r< r� )r� r� r� r� r r r r� � s zCaselessLiteral.parseImpl)T)r r r r� r� r� r� r r )r� r r$ � s
c s" e Zd ZdZd� fdd� Z� ZS )r# z�
Caseless version of :class:`Keyword`.
Example::
OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
(Contrast with example for :class:`CaselessLiteral`.)
Nc s t t| �j||dd� d S )NT)r� )r{ r# r� )r� r� r� )r� r r r� � s zCaselessKeyword.__init__)N)r r r r� r� r� r r )r� r r# � s c s, e Zd ZdZd� fdd� Zd dd�Z� ZS )
r� a� A variation on :class:`Literal` which matches "close" matches,
that is, strings with at most 'n' mismatching characters.
:class:`CloseMatch` takes parameters:
- ``match_string`` - string to be matched
- ``maxMismatches`` - (``default=1``) maximum number of
mismatches allowed to count as a match
The results from a successful parse will contain the matched text
from the input string and the following named results:
- ``mismatches`` - a list of the positions within the
match_string where mismatches were found
- ``original`` - the original match_string used to compare
against the input string
If ``mismatches`` is an empty list, then the match was an exact
match.
Example::
patt = CloseMatch("ATCATCGAATGGA")
patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
# exact match
patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
# close match allowing up to 2 mismatches
patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
r� c sB t t| ��� || _|| _|| _d| j| jf | _d| _d| _d S )Nz&Expected %r (with up to %d mismatches)F) r{ r� r� r � match_string�
maxMismatchesr� r� r� )r� r� r� )r� r r r� � s zCloseMatch.__init__Tc C s� |}t |�}|t | j� }||kr�| j}d}g } | j}
x|tt|||� |��D ]0\}} | \} }
| |
krN| �|� t | �|
krNP qNW |d }t|||� g�}||d< | |d< ||fS t||| j| ��d S )Nr r� �original�
mismatches) r� r� r� r� r� r� r? r< r� )r� r� r� r� �startr� �maxlocr� �match_stringlocr� r� �s_m�src�mat�resultsr r r r� � s(
zCloseMatch.parseImpl)r� )T)r r r r� r� r� r� r r )r� r r� � s c s8 e Zd ZdZd
� fdd� Zdd d
�Z� fd d �Z� ZS )rL aX Token for matching words composed of allowed character sets.
Defined with string containing all allowed initial characters, an
optional string containing allowed body characters (if omitted,
defaults to the initial character set), and an optional minimum,
maximum, and/or exact length. The default value for ``min`` is
1 (a minimum value < 1 is not valid); the default values for
``max`` and ``exact`` are 0, meaning no maximum or exact
length restriction. An optional ``excludeChars`` parameter can
list characters that might be found in the input ``bodyChars``
string; useful to define a word of all printables except for one or
two characters, for instance.
:class:`srange` is useful for defining custom character set strings
for defining ``Word`` expressions, using range notation from
regular expression character sets.
A common mistake is to use :class:`Word` to match a specific literal
string, as in ``Word("Address")``. Remember that :class:`Word`
uses the string argument to define *sets* of matchable characters.
This expression would match "Add", "AAA", "dAred", or any other word
made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an
exact literal string, use :class:`Literal` or :class:`Keyword`.
pyparsing includes helper strings for building Words:
- :class:`alphas`
- :class:`nums`
- :class:`alphanums`
- :class:`hexnums`
- :class:`alphas8bit` (alphabetic characters in ASCII range 128-255
- accented, tilded, umlauted, etc.)
- :class:`punc8bit` (non-alphabetic characters in ASCII range
128-255 - currency, symbols, superscripts, diacriticals, etc.)
- :class:`printables` (any non-whitespace character)
Example::
# a word composed of digits
integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
# a word with a leading capital, and zero or more lowercase
capital_word = Word(alphas.upper(), alphas.lower())
# hostnames are alphanumeric, with leading alpha, and '-'
hostname = Word(alphas, alphanums + '-')
# roman numeral (not a strict parser, accepts invalid mix of characters)
roman = Word("IVXLCDM")
# any string of non-whitespace characters, except for ','
csv_value = Word(printables, excludeChars=",")
Nr� r Fc s� t t| ��� � rNt� �� d�� fdd�|D ��}|rNd�� fdd�|D ��}|| _t|�| _|rt|| _t|�| _n|| _t|�| _|dk| _ |dk r�t
d��|| _ |dkr�|| _ nt
| _ |dkr�|| _ || _ t| �| _d| j | _d | _|| _d
| j| j k�r�|dk�r�|dk�r�|dk�r�| j| jk�r@d t| j� | _nHt| j�dk�rnd t�| j�t| j�f | _nd
t| j�t| j�f | _| j�r�d| j d | _yt�| j�| _W n tk
�r� d | _Y nX | jj| _t | _ d S )Nr� c 3 s | ]}|� kr|V qd S )Nr )r r� )� excludeCharsr r r� H s z Word.__init__.<locals>.<genexpr>c 3 s | ]}|� kr|V qd S )Nr )r r� )r� r r r� J s r r� zZcannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permittedz Expected Fr� z[%s]+z%s[%s]*z [%s][%s]*z\b) r{ rL r� r� r� �
initCharsOrig� initChars�
bodyCharsOrig� bodyChars� maxSpecifiedr< �minLen�maxLenrz r� r r� r� � asKeyword�_escapeRegexRangeChars�reStringr� r� �escape�compiler� r� �re_match�
_WordRegexr� )r� r� r� �min�max�exactr� r� )r� )r� r r� D sV
0
z
Word.__init__Tc C s || | j kr t||| j| ��|}|d7 }t|�}| j}|| j }t||�}x ||k rl|| |krl|d7 }qNW d}|| | jk r�d}nV| jr�||k r�|| |kr�d}n6| j r�|dkr�||d |ks�||k r�|| |kr�d}|r�t||| j| ��||||� fS )Nr� FTr )
r� r< r� r� r� r� r� r� r� r� ) r� r� r� r� r� r� � bodycharsr� �throwExceptionr r r r� } s,
zWord.parseImplc st yt t| ��� S tk
r" Y nX | jd krndd� }| j| jkr^d|| j�|| j�f | _nd|| j� | _| jS )Nc S s$ t | �dkr | d d� d S | S d S )N� z...)r� )r� r r r �
charsAsStr� s z Word.__str__.<locals>.charsAsStrz
W:(%s, %s)zW:(%s))r{ rL r� r� r� r� r� )r� r� )r� r r r� � s
z Word.__str__)Nr� r r FN)T)r r r r� r� r� r� r� r r )r� r rL s 49
c @ s e Zd Zddd�ZdS )r� Tc C s4 | � ||�}|s t||| j| ��|�� }||�� fS )N)r� r< r� �end�group)r� r� r� r� rw r r r r� � s
z_WordRegex.parseImplN)T)r r r r� r r r r r� � s r� c s" e Zd ZdZd� fdd� Z� ZS )rP z�A short-cut class for defining ``Word(characters, exact=1)``,
when defining a match of any single character in a string of
characters.
FNc sZ t t| �j|d||d� dtd�| j�� | _|r>d| j | _t�| j�| _| jj | _
d S )Nr� )r� r� r� z[%s]r� z\b%s\b) r{ rP r� r� r� r� r� r� r� r� r� )r� �charsetr� r� )r� r r r� � s z
Char.__init__)FN)r r r r� r� r� r r )r� r rP � s c sT e Zd ZdZd� fdd� Zddd�Zdd d
�Zdd d �Z� fd
d�Zdd� Z � Z
S )rD ah Token for matching strings that match a given regular
expression. Defined with string specifying the regular expression in
a form recognized by the stdlib Python `re module <https://docs.python.org/3/library/re.html>`_.
If the given regex contains named groups (defined using ``(?P<name>...)``),
these will be preserved as named parse results.
If instead of the Python stdlib re module you wish to use a different RE module
(such as the `regex` module), you can replace it by either building your
Regex object with a compiled RE that was compiled using regex:
Example::
realnum = Regex(r"[+-]?\d+\.\d*")
date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
# ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
# use regex module instead of stdlib re module to construct a Regex using
# a compiled regular expression
import regex
parser = pp.Regex(regex.compile(r'[0-9]'))
r Fc s$ t t| ��� t|t�r�|s,tjdtdd� || _|| _ y t
� | j| j �| _
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jk
r� tjd| tdd� � Y q�X n8t|d�r�t|d�r�|| _
|j | _| _ || _ ntd��| j
j| _t| �| _d| j | _d | _| �d
�d k | _|| _|| _| j�r| j| _| j�r | j | _d S ) a The parameters ``pattern`` and ``flags`` are passed
to the ``re.compile()`` function as-is. See the Python
`re module <https://docs.python.org/3/library/re.html>`_ module for an
explanation of the acceptable patterns and flags.
z0null string passed to Regex; use Empty() insteadr� )r0 z$invalid pattern (%s) passed to Regex�patternr� zCRegex may only be constructed with a string or a compiled RE objectz Expected Fr� N) r{ rD r� r� r r3 r4 r5 r� �flagsr� r� r� �
sre_constants�errorr; r! r� r� r� r r� r� r� � asGroupList�asMatch�parseImplAsGroupListr� �parseImplAsMatch)r� r� r� r� r� )r� r r r� � s<
zRegex.__init__Tc C sf | � ||�}|s t||| j| ��|�� }t|�� �}|�� }|r^x |�� D ]\}}|||< qJW ||fS )N)r� r< r� r� r? r� � groupdictr, ) r� r� r� r� rw r� �dr& r# r r r r�
s zRegex.parseImplc C s8 | � ||�}|s t||| j| ��|�� }|�� }||fS )N)r� r< r� r� �groups)r� r� r� r� rw r� r r r r�
s zRegex.parseImplAsGroupListc C s4 | � ||�}|s t||| j| ��|�� }|}||fS )N)r� r< r� r� )r� r� r� r� rw r� r r r r� !
s zRegex.parseImplAsMatchc sD yt t| ��� S tk
r" Y nX | jd kr>dt| j� | _| jS )NzRe:(%s))r{ rD r� r� r� r r� )r� )r� r r r� *
s
z
Regex.__str__c sl �j r tjdtdd� t� ��jr@t� �r@tjdtdd� t� ��jrT� fdd�}n� �fdd�}��|�S )a�
Return Regex with an attached parse action to transform the parsed
result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
Example::
make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
print(make_html.transformString("h1:main title:"))
# prints "<h1>main title</h1>"
z-cannot use sub() with Regex(asGroupList=True)r� )r0 z9cannot use sub() with a callable with Regex(asMatch=True)c s | d � � �S )Nr )�expand)r� )�replr r r� K
s zRegex.sub.<locals>.pac s �j �� | d �S )Nr )r� r' )r� )r� r� r r r� N
s )r� r3 r4 r5 � SyntaxErrorr� r� r� )r� r� r� r )r� r� r r' 5
s
z Regex.sub)r FF)T)T)T) r r r r� r� r� r� r� r� r' r� r r )r� r rD � s -
c s8 e Zd ZdZd � fdd� Zd dd�Z� fd d
�Z� ZS )
rB a&
Token for matching strings that are delimited by quoting characters.
Defined with the following parameters:
- quoteChar - string of one or more characters defining the
quote delimiting string
- escChar - character to escape quotes, typically backslash
(default= ``None``)
- escQuote - special quote sequence to escape an embedded quote
string (such as SQL's ``""`` to escape an embedded ``"``)
(default= ``None``)
- multiline - boolean indicating whether quotes can span
multiple lines (default= ``False``)
- unquoteResults - boolean indicating whether the matched text
should be unquoted (default= ``True``)
- endQuoteChar - string of one or more characters defining the
end of the quote delimited string (default= ``None`` => same as
quoteChar)
- convertWhitespaceEscapes - convert escaped whitespace
(``'\t'``, ``'\n'``, etc.) to actual whitespace
(default= ``True``)
Example::
qs = QuotedString('"')
print(qs.searchString('lsjdf "This is the quote" sldjf'))
complex_qs = QuotedString('{{', endQuoteChar='}}')
print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
sql_qs = QuotedString('"', escQuote='""')
print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
prints::
[['This is the quote']]
[['This is the "quote"']]
[['This is the quote with "embedded" quotes']]
NFTc
sX t t� ��� |�� }|s0tjdtdd� t� �|d kr>|}n"|�� }|s`tjdtdd� t� �|� _t |�� _
|d � _ |� _ t |�� _
|� _|� _|� _|� _|r�tjtjB � _dt�� j�t� j d �|d k r�t|�p�df � _n<d� _dt�� j�t� j d �|d k �rt|��p df � _t � j �d k�rp� jd
d �� fd d
�tt � j �d dd�D �� d 7 _|�r�� jdt�|� 7 _|�r�� jdt�|� 7 _t�� j�d � _� jdt�� j � 7 _y(t� � j� j�� _� j� _ � jj � _ W n0 t j!k
�r0 tjd� j tdd� � Y nX t"� �� _#d� j# � _$d� _%d� _&d S )Nz$quoteChar cannot be the empty stringr� )r0 z'endQuoteChar cannot be the empty stringr z %s(?:[^%s%s]r� z%s(?:[^%s\n\r%s]r� z|(?:z)|(?:c 3 s4 | ],}d t �� jd|� �t� j| �f V qdS )z%s[^%s]N)r� r� � endQuoteCharr� )r r� )r� r r r� �
s z(QuotedString.__init__.<locals>.<genexpr>r� �)z|(?:%s)z|(?:%s.)z(.)z)*%sz$invalid pattern (%s) passed to Regexz Expected FT)'r{ rB r� r� r3 r4 r5 r� � quoteCharr� � quoteCharLen�firstQuoteCharr� �endQuoteCharLen�escChar�escQuote�unquoteResults�convertWhitespaceEscapesr� � MULTILINE�DOTALLr� r� r� r� r� r) �escCharReplacePatternr� r� r� r� r� r� r� r r� r� r� )r� r� r� r� � multiliner� r� r� )r� )r� r r� y
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zQuotedString.__init__c C s� || | j kr| �||�p d }|s2t||| j| ��|�� }|�� }| jr�|| j| j � }t |t
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s(
zQuotedString.parseImplc sF yt t| ��� S tk
r" Y nX | jd kr@d| j| jf | _| jS )Nz.quoted string, starting with %s ending with %s)r{ rB r� r� r� r� r� )r� )r� r r r� �
s
zQuotedString.__str__)NNFTNT)T)r r r r� r� r� r� r� r r )r� r rB R
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�Z� ZS )
r% a� Token for matching words composed of characters *not* in a given
set (will include whitespace in matched characters if not listed in
the provided exclusion set - see example). Defined with string
containing all disallowed characters, and an optional minimum,
maximum, and/or exact length. The default value for ``min`` is
1 (a minimum value < 1 is not valid); the default values for
``max`` and ``exact`` are 0, meaning no maximum or exact
length restriction.
Example::
# define a comma-separated-value as anything that is not a ','
csv_value = CharsNotIn(',')
print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
prints::
['dkls', 'lsdkjf', 's12 34', '@!#', '213']
r� r c s� t t| ��� d| _|| _|dk r*td��|| _|dkr@|| _nt| _|dkrZ|| _|| _t | �| _
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d S )NFr� zfcannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permittedr z Expected )r{ r% r� r� �notCharsr< r� r� rz r� r r� r� r� )r� r� r� r� r� )r� r r r� �
s
zCharsNotIn.__init__Tc C s� || | j kr t||| j| ��|}|d7 }| j }t|| j t|��}x ||k rd|| |krd|d7 }qFW || | jk r�t||| j| ��||||� fS )Nr� )r� r< r� r� r� r� r� )r� r� r� r� r� �notchars�maxlenr r r r� s zCharsNotIn.parseImplc sd yt t| ��� S tk
r" Y nX | jd kr^t| j�dkrRd| jd d� | _n d| j | _| jS )Nr� z
!W:(%s...)z!W:(%s))r{ r% r� r� r� r� r� )r� )r� r r r� & s
zCharsNotIn.__str__)r� r r )T)r r r r� r� r� r� r� r r )r� r r% �
s
c s` e Zd ZdZdddddddd d
d d d
dddddddddddd�Zd"� fd d � Zd#d d!�Z� ZS )$rK a� Special matching class for matching whitespace. Normally,
whitespace is ignored by pyparsing grammars. This class is included
when some whitespace structures are significant. Define with
a string containing the whitespace characters to be matched; default
is ``" \t\r\n"``. Also takes optional ``min``,
``max``, and ``exact`` arguments, as defined for the
:class:`Word` class.
z<SP>z<TAB>z<LF>z<CR>z<FF>z<NBSP>z<OGHAM_SPACE_MARK>z<MONGOLIAN_VOWEL_SEPARATOR>z <EN_QUAD>z <EM_QUAD>z
<EN_SPACE>z
<EM_SPACE>z<THREE-PER-EM_SPACE>z<FOUR-PER-EM_SPACE>z<SIX-PER-EM_SPACE>z<FIGURE_SPACE>z<PUNCTUATION_SPACE>z <THIN_SPACE>z <HAIR_SPACE>z<ZERO_WIDTH_SPACE>z<NNBSP>z<MMSP>z<IDEOGRAPHIC_SPACE>)r� r� r� r� r� � u u u u u u u u u u u u u u u u u �
r� r c s� t t� ��� |� _� �d�� fdd�� jD ��� d�dd� � jD ��� _d� _d� j � _ |� _
|dkrt|� _ nt � _ |dkr�|� _ |� _
d S )Nr� c 3 s | ]}|� j kr|V qd S )N)�
matchWhite)r r� )r� r r r� Y s z!White.__init__.<locals>.<genexpr>c s s | ]}t j| V qd S )N)rK � whiteStrs)r r� r r r r� [ s Tz Expected r )
r{ rK r� r� rL r� r� r r� r� r� r� rz )r� �wsr� r� r� )r� )r� r r� V s zWhite.__init__Tc C s� || | j kr t||| j| ��|}|d7 }|| j }t|t|��}x"||k rd|| | j krd|d7 }qDW || | jk r�t||| j| ��||||� fS )Nr� )r� r< r� r� r� r� r� )r� r� r� r� r� r� r r r r� j s
zWhite.parseImpl)r� r� r r )T)r r r r� r� r� r� r� r r )r� r rK 4 s4 c s e Zd Z� fdd�Z� ZS )�_PositionTokenc s( t t| ��� | jj| _d| _d| _d S )NTF)r{ r� r� r� r r r� r� )r� )r� r r r� { s
z_PositionToken.__init__)r r r r� r� r r )r� r r� z s r� c s2 e Zd ZdZ� fdd�Zdd� Zd dd�Z� ZS )
r, zaToken to advance to a specific column of input text; useful for
tabular report scraping.
c s t t| ��� || _d S )N)r{ r, r� rW )r� �colno)r� r r r� � s zGoToColumn.__init__c C s` t ||�| j kr\t|�}| jr*| �||�}x0||k rZ|| �� rZt ||�| j krZ|d7 }q,W |S )Nr� )rW r� r� r� �isspace)r� r� r� r� r r r r� � s & zGoToColumn.preParseTc C sD t ||�}|| j kr"t||d| ��|| j | }|||� }||fS )NzText not in expected column)rW r< )r� r� r� r� �thiscol�newlocr� r r r r� � s
zGoToColumn.parseImpl)T)r r r r� r� r� r� r� r r )r� r r, � s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r0 a� Matches if current position is at the beginning of a line within
the parse string
Example::
test = '''\
AAA this line
AAA and this line
AAA but not this one
B AAA and definitely not this one
'''
for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
print(t)
prints::
['AAA', ' this line']
['AAA', ' and this line']
c s t t| ��� d| _d S )NzExpected start of line)r{ r0 r� r� )r� )r� r r r� � s zLineStart.__init__Tc C s* t ||�dkr|g fS t||| j| ��d S )Nr� )rW r< r� )r� r� r� r� r r r r� � s zLineStart.parseImpl)T)r r r r� r� r� r� r r )r� r r0 � s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r/ zTMatches if current position is at the end of a line within the
parse string
c s, t t| ��� | �tj�dd�� d| _d S )Nr� r� zExpected end of line)r{ r/ r� rL rA r� r� r� )r� )r� r r r� � s zLineEnd.__init__Tc C sb |t |�k r6|| dkr$|d dfS t||| j| ��n(|t |�krN|d g fS t||| j| ��d S )Nr� r� )r� r< r� )r� r� r� r� r r r r� � s zLineEnd.parseImpl)T)r r r r� r� r� r� r r )r� r r/ � s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )rG zLMatches if current position is at the beginning of the parse
string
c s t t| ��� d| _d S )NzExpected start of text)r{ rG r� r� )r� )r� r r r� � s zStringStart.__init__Tc C s0 |dkr(|| � |d�kr(t||| j| ��|g fS )Nr )r� r< r� )r� r� r� r� r r r r� � s zStringStart.parseImpl)T)r r r r� r� r� r� r r )r� r rG � s c s* e Zd ZdZ� fdd�Zddd�Z� ZS )rF zBMatches if current position is at the end of the parse string
c s t t| ��� d| _d S )NzExpected end of text)r{ rF r� r� )r� )r� r r r� � s zStringEnd.__init__Tc C s^ |t |�k r t||| j| ��n<|t |�kr6|d g fS |t |�krJ|g fS t||| j| ��d S )Nr� )r� r< r� )r� r� r� r� r r r r� � s zStringEnd.parseImpl)T)r r r r� r� r� r� r r )r� r rF � s c s. e Zd ZdZef� fdd� Zddd�Z� ZS )rN ay Matches if the current position is at the beginning of a Word,
and is not preceded by any character in a given set of
``wordChars`` (default= ``printables``). To emulate the
```` behavior of regular expressions, use
``WordStart(alphanums)``. ``WordStart`` will also match at
the beginning of the string being parsed, or at the beginning of
a line.
c s" t t| ��� t|�| _d| _d S )NzNot at the start of a word)r{ rN r� r� � wordCharsr� )r� r� )r� r r r� � s
zWordStart.__init__Tc C s@ |dkr8||d | j ks(|| | j kr8t||| j| ��|g fS )Nr r� )r� r< r� )r� r� r� r� r r r r� � s
zWordStart.parseImpl)T)r r r r� rt r� r� r� r r )r� r rN � s c s. e Zd ZdZef� fdd� Zddd�Z� ZS )rM a_ Matches if the current position is at the end of a Word, and is
not followed by any character in a given set of ``wordChars``
(default= ``printables``). To emulate the ```` behavior of
regular expressions, use ``WordEnd(alphanums)``. ``WordEnd``
will also match at the end of the string being parsed, or at the end
of a line.
c s( t t| ��� t|�| _d| _d| _d S )NFzNot at the end of a word)r{ rM r� r� r� r� r� )r� r� )r� r r r� s
zWordEnd.__init__Tc C sP t |�}|dkrH||k rH|| | jks8||d | jkrHt||| j| ��|g fS )Nr r� )r� r� r< r� )r� r� r� r� r� r r r r� s zWordEnd.parseImpl)T)r r r r� rt r� r� r� r r )r� r rM s c sz e Zd ZdZd� fdd� Zdd� Zdd� Z� fd d
�Z� fd d �Z� fd
d�Z ddd�Z
� fdd�Z d� fdd� Z � Z
S )r= z]Abstract subclass of ParserElement, for combining and
post-processing parsed tokens.
Fc s� t t� ��|� t|t�r"t|�}t|t�r<� �|�g� _n�t|t �rP|g� _nnt|t
�r�t|�}t dd� |D ��r�� fdd�|D �}t|�� _n,yt|�� _W n t k
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r� r! r� )r� r� r� )r� )r� r r� s"
zParseExpression.__init__c C s | j �|� d | _| S )N)r� r� r� )r� rS r r r r� 4 s zParseExpression.appendc C s4 d| _ dd� | jD �| _x| jD ] }|�� q W | S )z�Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
all contained expressions.Fc S s g | ] }|� � �qS r )rR )r r� r r r r = s z3ParseExpression.leaveWhitespace.<locals>.<listcomp>)r� r� rK )r� r� r r r rK 9 s
z ParseExpression.leaveWhitespacec sz t |t�rF|| jkrvtt| ��|� xP| jD ]}|�| jd � q,W n0tt| ��|� x | jD ]}|�| jd � q^W | S )Nr� )r� rH r� r{ r= rN r� )r� rS r� )r� r r rN B s
zParseExpression.ignorec sL yt t| ��� S tk
r" Y nX | jd krFd| jjt| j�f | _| jS )Nz%s:(%s)) r{ r= r� r� r� r� r r� r� )r� )r� r r r� N s
zParseExpression.__str__c s. t t| ��� x| jD ] }|�� qW t| j�dk�r | jd }t|| j�r�|js�|jd kr�|j s�|jd d � | jd g | _d | _
| j |j O _ | j |j O _ | jd }t|| j��r |j�s |jd k�r |j �s | jd d� |jd d � | _d | _
| j |j O _ | j |j O _ dt
| � | _| S )Nr� r r� r� z Expected )r{ r= r r� r� r� r� r� r� r� r� r� r� r� r� )r� r� rS )r� r r r X s0
zParseExpression.streamlineNc C sF |d k r |ng d d � | g }x| j D ]}|�|� q&W | �g � d S )N)r� rV rT )r� rU �tmpr� r r r rV z s zParseExpression.validatec s$ t t| ��� }dd� | jD �|_|S )Nc S s g | ] }|� � �qS r )rR )r r� r r r r � s z(ParseExpression.copy.<locals>.<listcomp>)r{ r= rR r� )r� r� )r� r r rR � s zParseExpression.copyc sZ t jrHx@| jD ]6}t|t�r|jrtjd�d|t | �j
|j�dd� qW t t | ��
||�S )Nz]{0}: setting results name {1!r} on {2} expression collides with {3!r} on contained expressionr r� )r0 )r r r� r� rA r� r3 r4 r� r� r r{ r= r� )r� r r� r� )r� r r r� � s z ParseExpression._setResultsName)F)N)F)r r r r� r� r� rK rN r� r rV rR r� r� r r )r� r r= s
"
c s` e Zd ZdZG dd� de�Zd� fdd� Z� fdd�Zdd d
�Zd d � Z d
d� Z
dd� Z � Z S )r" a
Requires all given :class:`ParseExpression` s to be found in the given order.
Expressions may be separated by whitespace.
May be constructed using the ``'+'`` operator.
May also be constructed using the ``'-'`` operator, which will
suppress backtracking.
Example::
integer = Word(nums)
name_expr = OneOrMore(Word(alphas))
expr = And([integer("id"), name_expr("name"), integer("age")])
# more easily written as:
expr = integer("id") + name_expr("name") + integer("age")
c s e Zd Z� fdd�Z� ZS )zAnd._ErrorStopc s& t tj| �j||� d| _| �� d S )N�-)r{ r" r6 r� r rK )r� r� rE )r� r r r� � s zAnd._ErrorStop.__init__)r r r r� r� r r )r� r r6 � s r6 Tc s� t |�}|r�t|kr�g }xlt|�D ]`\}}|tkrx|t|�d k rnt� ||d jd }|�t|�d�� q�td��q"|�|� q"W ||d d �< t t
| �� ||� t dd� | jD ��| _
| �| jd j� | jd j| _d| _d S ) Nr� r� z _skipped*z0cannot construct And with sequence ending in ...c s s | ] }|j V qd S )N)r� )r r� r r r r� � s z And.__init__.<locals>.<genexpr>r T)r r1 r� r� r) r� r� rE r� r{ r" r� r� r� rL r� r� r� )r� r� r� r� r� r� �
skipto_arg)r� r r r� � s
z And.__init__c s� | j r�tdd� | j d d� D ��r�xtt| j d d� �D ]^\}}|d krHq6t|t�r6|j r6t|j d t�r6|j d | j |d |j d< d | j |d < q6W dd� | j D �| _ tt| ��� t dd� | j D ��| _
| S )Nc s s. | ]&}t |t�o$|jo$t |jd t�V qdS )r� N)r� r= r� r2 )r r� r r r r� � s z!And.streamline.<locals>.<genexpr>r� r� c S s g | ]}|d k r|�qS )Nr )r r� r r r r � s z"And.streamline.<locals>.<listcomp>c s s | ] }|j V qd S )N)r� )r r� r r r r� � s ) r� r� r� r� r= r2 r{ r" r r� r� )r� r� r� )r� r r r � s
zAnd.streamlinec C s | j d j|||dd�\}}d}x�| j dd � D ]�}t|tj�rFd}q0|r�y|�|||�\}}W q� tk
rv � Y q� tk
r� } zd |_t�|��W d d }~X Y q� t k
r� t|t
|�| j | ��Y q�X n|�|||�\}}|s�|� � r0||7 }q0W ||fS )Nr F)r� r� T)
r� r� r� r" r6 r@ r: r� r� r" r� r� rC ) r� r� r� r� �
resultlist� errorStopr� �
exprtokensr� r r r r� � s( z
And.parseImplc C s t |t�r| �|�}| �|�S )N)r� r r� r� )r� rS r r r rN � s
z And.__iadd__c C s8 |d d � | g }x | j D ]}|�|� |jsP qW d S )N)r� rT r� )r� r �subRecCheckListr� r r r rT � s
zAnd.checkRecursionc C s@ t | d�r| jS | jd kr:dd�dd� | jD �� d | _| jS )Nr �{r� c s s | ]}t |�V qd S )N)r� )r r� r r r r� � s z And.__str__.<locals>.<genexpr>�})r; r r� r� r� )r� r r r r� � s
z And.__str__)T)T)
r r r r� r) r6 r� r r� rN rT r� r� r r )r� r r" � s
c s^ e Zd ZdZd� fdd� Z� fdd�Zddd �Zd
d � Zd d
� Zdd� Z d� fdd� Z
� Z S )r9 a� Requires that at least one :class:`ParseExpression` is found. If
two expressions match, the expression that matches the longest
string will be used. May be constructed using the ``'^'``
operator.
Example::
# construct Or using '^' operator
number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
print(number.searchString("123 3.1416 789"))
prints::
[['123'], ['3.1416'], ['789']]
Fc s: t t| ��||� | jr0tdd� | jD ��| _nd| _d S )Nc s s | ] }|j V qd S )N)r� )r r� r r r r� s z Or.__init__.<locals>.<genexpr>T)r{ r9 r� r� r� r� )r� r� r� )r� r r r� s z Or.__init__c s. t t| ��� tjr*tdd� | jD ��| _| S )Nc s s | ] }|j V qd S )N)r� )r r� r r r r� s z Or.streamline.<locals>.<genexpr>)r{ r9 r r! �collect_all_And_tokensr� r� r� )r� )r� r r r s z
Or.streamlineTc C s� d}d }g }x�| j D ]�}y|�||�}W nv tk
rd } z d | _| j|krT| }| j}W d d } ~ X Y q tk
r� t|�|kr�t|t|�|j| �}t|�}Y qX |�||f� qW |�r�|j t
d�dd� |s�|d d }
|
� |||�S d} x�|D ]�\} }
| | d k�r | S y|
� |||�\}}W n@ tk
�rb } z d | _| j|k�rR| }| j}W d d } ~ X Y q�X || k�rv||fS || d kr�||f} q�W | dk�r�| S |d k �r�| j|_ |�nt||d| ��d S )Nr� r T)rI r+ r� )r� Nz no defined alternatives to match)
r� r� r< r� r� r" r� r� r� �sortr r� r� )r� r� r� r� � maxExcLoc� maxExceptionr$ r� �loc2r� � best_expr�longest�loc1�expr1r� r r r r� sT
z Or.parseImplc C s t |t�r| �|�}| �|�S )N)r� r r� r� )r� rS r r r �__ixor__[ s
z Or.__ixor__c C s@ t | d�r| jS | jd kr:dd�dd� | jD �� d | _| jS )Nr r� z ^ c s s | ]}t |�V qd S )N)r� )r r� r r r r� e s z Or.__str__.<locals>.<genexpr>r� )r; r r� r� r� )r� r r r r� ` s
z
Or.__str__c C s0 |d d � | g }x| j D ]}|�|� qW d S )N)r� rT )r� r r� r� r r r rT i s zOr.checkRecursionc sP t js>tjr>tdd� | jD ��r>tjd�d|t | �j
�dd� t t | ��
||�S )Nc s s | ]}t |t�V qd S )N)r� r" )r r� r r r r� q s z%Or._setResultsName.<locals>.<genexpr>z�{0}: setting results name {1!r} on {2} expression may only return a single token for an And alternative, in future will return the full list of tokensr r� )r0 )r! r� r r r� r� r3 r4 r� r� r r{ r9 r� )r� r r� )r� r r r� n s zOr._setResultsName)F)T)F) r r r r� r� r r� r� r� rT r� r� r r )r� r r9 s
= c s^ e Zd ZdZd� fdd� Z� fdd�Zddd �Zd
d � Zd d
� Zdd� Z d� fdd� Z
� Z S )r3 a� Requires that at least one :class:`ParseExpression` is found. If
two expressions match, the first one listed is the one that will
match. May be constructed using the ``'|'`` operator.
Example::
# construct MatchFirst using '|' operator
# watch the order of expressions to match
number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
print(number.searchString("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']]
# put more selective expression first
number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
print(number.searchString("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']]
Fc s: t t| ��||� | jr0tdd� | jD ��| _nd| _d S )Nc s s | ] }|j V qd S )N)r� )r r� r r r r� � s z&MatchFirst.__init__.<locals>.<genexpr>T)r{ r3 r� r� r� r� )r� r� r� )r� r r r� � s zMatchFirst.__init__c s. t t| ��� tjr*tdd� | jD ��| _| S )Nc s s | ] }|j V qd S )N)r� )r r� r r r r� � s z(MatchFirst.streamline.<locals>.<genexpr>)r{ r3 r r! r� r� r� r� )r� )r� r r r � s zMatchFirst.streamlineTc C s� d}d }x�| j D ]�}y|�|||�}|S tk
r\ } z|j|krL|}|j}W d d }~X Y q tk
r� t|�|kr�t|t|�|j| �}t|�}Y qX qW |d k r�| j|_|�nt||d| ��d S )Nr� z no defined alternatives to match)r� r� r< r� r" r� r� r� ) r� r� r� r� r� r� r� r� r� r r r r� � s$
zMatchFirst.parseImplc C s t |t�r| �|�}| �|�S )N)r� r r� r� )r� rS r r r �__ior__� s
zMatchFirst.__ior__c C s@ t | d�r| jS | jd kr:dd�dd� | jD �� d | _| jS )Nr r� z | c s s | ]}t |�V qd S )N)r� )r r� r r r r� � s z%MatchFirst.__str__.<locals>.<genexpr>r� )r; r r� r� r� )r� r r r r� � s
zMatchFirst.__str__c C s0 |d d � | g }x| j D ]}|�|� qW d S )N)r� rT )r� r r� r� r r r rT � s zMatchFirst.checkRecursionc sP t js>tjr>tdd� | jD ��r>tjd�d|t | �j
�dd� t t | ��
||�S )Nc s s | ]}t |t�V qd S )N)r� r" )r r� r r r r� � s z-MatchFirst._setResultsName.<locals>.<genexpr>z�{0}: setting results name {1!r} on {2} expression may only return a single token for an And alternative, in future will return the full list of tokensr r� )r0 )r! r� r r r� r� r3 r4 r� r� r r{ r3 r� )r� r r� )r� r r r� � s zMatchFirst._setResultsName)F)T)F) r r r r� r� r r� r� r� rT r� r� r r )r� r r3 { s
c sH e Zd ZdZd
� fdd� Z� fdd�Zddd�Zd d
� Zd d � Z� Z S )r( as Requires all given :class:`ParseExpression` s to be found, but in
any order. Expressions may be separated by whitespace.
May be constructed using the ``'&'`` operator.
Example::
color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
integer = Word(nums)
shape_attr = "shape:" + shape_type("shape")
posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
color_attr = "color:" + color("color")
size_attr = "size:" + integer("size")
# use Each (using operator '&') to accept attributes in any order
# (shape and posn are required, color and size are optional)
shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
shape_spec.runTests('''
shape: SQUARE color: BLACK posn: 100, 120
shape: CIRCLE size: 50 color: BLUE posn: 50,80
color:GREEN size:20 shape:TRIANGLE posn:20,40
'''
)
prints::
shape: SQUARE color: BLACK posn: 100, 120
['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
- color: BLACK
- posn: ['100', ',', '120']
- x: 100
- y: 120
- shape: SQUARE
shape: CIRCLE size: 50 color: BLUE posn: 50,80
['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
- color: BLUE
- posn: ['50', ',', '80']
- x: 50
- y: 80
- shape: CIRCLE
- size: 50
color: GREEN size: 20 shape: TRIANGLE posn: 20,40
['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
- color: GREEN
- posn: ['20', ',', '40']
- x: 20
- y: 40
- shape: TRIANGLE
- size: 20
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s
z
Each.__init__c s( t t| ��� tdd� | jD ��| _| S )Nc s s | ] }|j V qd S )N)r� )r r� r r r r� s z"Each.streamline.<locals>.<genexpr>)r{ r( r r� r� r� )r� )r� r r r s zEach.streamlinec s� | j r�tdd� | jD ��| _dd� | jD �}dd� | jD �}|| | _dd� | jD �| _dd� | jD �| _dd� | jD �| _| j| j7 _d | _ |}| jd d � }| jd d � � g }d
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zEach.parseImplc C s@ t | d�r| jS | jd kr:dd�dd� | jD �� d | _| jS )Nr r� z & c s s | ]}t |�V qd S )N)r� )r r� r r r r� L s z Each.__str__.<locals>.<genexpr>r� )r; r r� r� r� )r� r r r r� G s
z Each.__str__c C s0 |d d � | g }x| j D ]}|�|� qW d S )N)r� rT )r� r r� r� r r r rT P s zEach.checkRecursion)T)T)
r r r r� r� r r� r� rT r� r r )r� r r( � s 8
1 c sj e Zd ZdZd� fdd� Zddd�Zdd � Z� fd
d �Z� fd d
�Zdd� Z ddd�Z
� fdd�Z � Z S )r; zfAbstract subclass of :class:`ParserElement`, for combining and
post-processing parsed tokens.
Fc s� t t| ��|� t|t�r@t| jt�r2| �|�}n| �t|��}|| _ d | _
|d k r�|j | _ |j | _ | �
|j� |j| _|j| _|j| _| j�|j� d S )N)r{ r; r� r� r �
issubclassr� rI r1 r� r� r� r� rL r� r� r� r� r� rO )r� r� r� )r� r r r� Z s
z ParseElementEnhance.__init__Tc C s2 | j d k r | j j|||dd�S td|| j| ��d S )NF)r� r� )r� r� r< r� )r� r� r� r� r r r r� l s
z ParseElementEnhance.parseImplc C s* d| _ | j�� | _| jd k r&| j�� | S )NF)r� r� rR rK )r� r r r rK r s
z#ParseElementEnhance.leaveWhitespacec sr t |t�rB|| jkrntt| ��|� | jd k rn| j�| jd � n,tt| ��|� | jd k rn| j�| jd � | S )Nr� )r� rH r� r{ r; rN r� )r� rS )r� r r rN y s
zParseElementEnhance.ignorec s& t t| ��� | jd k r"| j�� | S )N)r{ r; r r� )r� )r� r r r � s
z ParseElementEnhance.streamlinec C sB | |krt || g ��|d d � | g }| jd k r>| j�|� d S )N)rC r� rT )r� r r� r r r rT � s
z"ParseElementEnhance.checkRecursionNc C sB |d kr g }|d d � | g }| j d k r4| j �|� | �g � d S )N)r� rV rT )r� rU r� r r r rV � s
z ParseElementEnhance.validatec sV yt t| ��� S tk
r" Y nX | jd krP| jd k rPd| jjt| j�f | _| jS )Nz%s:(%s)) r{ r; r� r� r� r� r� r r� )r� )r� r r r� � s zParseElementEnhance.__str__)F)T)N)
r r r r� r� r� rK rN r rT rV r� r� r r )r� r r; V s
c s* e Zd ZdZ� fdd�Zddd�Z� ZS )r* ab Lookahead matching of the given parse expression.
``FollowedBy`` does *not* advance the parsing position within
the input string, it only verifies that the specified parse
expression matches at the current position. ``FollowedBy``
always returns a null token list. If any results names are defined
in the lookahead expression, those *will* be returned for access by
name.
Example::
# use FollowedBy to match a label only if it is followed by a ':'
data_word = Word(alphas)
label = data_word + FollowedBy(':')
attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
prints::
[['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
c s t t| ��|� d| _d S )NT)r{ r* r� r� )r� r� )r� r r r� � s zFollowedBy.__init__Tc C s( | j j|||d�\}}|d d �= ||fS )N)r� )r� r� )r� r� r� r� �_r� r r r r� � s
zFollowedBy.parseImpl)T)r r r r� r� r� r� r r )r� r r* � s c s, e Zd ZdZd � fdd� Zd
dd�Z� ZS ) r2 ap Lookbehind matching of the given parse expression.
``PrecededBy`` does not advance the parsing position within the
input string, it only verifies that the specified parse expression
matches prior to the current position. ``PrecededBy`` always
returns a null token list, but if a results name is defined on the
given expression, it is returned.
Parameters:
- expr - expression that must match prior to the current parse
location
- retreat - (default= ``None``) - (int) maximum number of characters
to lookbehind prior to the current parse location
If the lookbehind expression is a string, Literal, Keyword, or
a Word or CharsNotIn with a specified exact or maximum length, then
the retreat parameter is not required. Otherwise, retreat must be
specified to give a maximum number of characters to look back from
the current parse position for a lookbehind match.
Example::
# VB-style variable names with type prefixes
int_var = PrecededBy("#") + pyparsing_common.identifier
str_var = PrecededBy("$") + pyparsing_common.identifier
Nc s� t t| ��|� | �� �� | _d| _d| _d| _t|t �rJt
|�}d| _nVt|t t f�rf|j
}d| _n:t|ttf�r�|jtkr�|j}d| _nt|t�r�d}d| _|| _dt |� | _d| _| j�dd� � d S )NTFr znot preceded by c S s |� td d ��S )N)r3 r$ )r� r� r� r r r r� � r� z%PrecededBy.__init__.<locals>.<lambda>)r{ r2 r� r� rK r� r� r� r� r� r� r1 r. r� rL r% r� rz r� �retreatr� r� r� r� )r� r� r )r� r r r� � s*
zPrecededBy.__init__r Tc C s� | j r<|| jk r t||| j��|| j }| j�||�\}}n�| jt� }|td|| j �|� }t||| j�} xltdt || jd �d �D ]J}
y |�|t
|�|
�\}}W n& t k
r� } z| } W d d } ~ X Y q�X P q�W | �||fS )Nr r� ) r� r r< r� r� r� rF r� r) r� r� r: ) r� r� r� r� r� r r� � test_expr�instring_slice� last_exprrV �pber r r r� � s
zPrecededBy.parseImpl)N)r T)r r r r� r� r� r� r r )r� r r2 � s c s2 e Zd ZdZ� fdd�Zd dd�Zdd� Z� ZS )
r5 a� Lookahead to disallow matching with the given parse expression.
``NotAny`` does *not* advance the parsing position within the
input string, it only verifies that the specified parse expression
does *not* match at the current position. Also, ``NotAny`` does
*not* skip over leading whitespace. ``NotAny`` always returns
a null token list. May be constructed using the '~' operator.
Example::
AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split())
# take care not to mistake keywords for identifiers
ident = ~(AND | OR | NOT) + Word(alphas)
boolean_term = Optional(NOT) + ident
# very crude boolean expression - to support parenthesis groups and
# operation hierarchy, use infixNotation
boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term)
# integers that are followed by "." are actually floats
integer = Word(nums) + ~Char(".")
c s0 t t| ��|� d| _d| _dt| j� | _d S )NFTzFound unwanted token, )r{ r5 r� r� r� r� r� r� )r� r� )r� r r r� * s zNotAny.__init__Tc C s& | j �||�r t||| j| ��|g fS )N)r� r� r< r� )r� r� r� r� r r r r� 1 s zNotAny.parseImplc C s4 t | d�r| jS | jd kr.dt| j� d | _| jS )Nr z~{r� )r; r r� r� r� )r� r r r r� 6 s
zNotAny.__str__)T)r r r r� r� r� r� r� r r )r� r r5 s
c s> e Zd Zd � fdd� Zdd� Zd
dd�Zd� fd
d � Z� ZS )�_MultipleMatchNc s< t t| ��|� d| _|}t|t�r.| �|�}| �|� d S )NT)r{ r r� r� r� r r� �stopOn)r� r� r �ender)r� r r r� @ s
z_MultipleMatch.__init__c C s, t |t�r| �|�}|d k r"| nd | _| S )N)r� r r� � not_ender)r� r r r r r H s
z_MultipleMatch.stopOnTc C s� | j j}| j}| jd k }|r$| jj}|r2|||� ||||dd�\}}yZ| j } xJ|rb|||� | rr|||�}
n|}
|||
|�\}} | s�| �� rT|| 7 }qTW W n ttfk
r� Y nX ||fS )NF)r� ) r� r� r� r r� r� rC r< r" ) r� r� r� r� �self_expr_parse�self_skip_ignorables� check_ender�
try_not_enderr� �hasIgnoreExprsr� � tmptokensr r r r� N s,
z_MultipleMatch.parseImplFc sj t jrXxP| jgt| jdg � D ]6}t|t�r |jr tjd� d|t
| �j |j�dd� q W t t
| ��||�S )Nr� z]{0}: setting results name {1!r} on {2} expression collides with {3!r} on contained expressionr r� )r0 )r r r� r� r� rA r� r3 r4 r� r� r r{ r r� )r� r r� r� )r� r r r� k s z _MultipleMatch._setResultsName)N)T)F)r r r r� r r� r� r� r r )r� r r ? s
r c @ s e Zd ZdZdd� ZdS )r6 aj Repetition of one or more of the given expression.
Parameters:
- expr - expression that must match one or more times
- stopOn - (default= ``None``) - expression for a terminating sentinel
(only required if the sentinel would ordinarily match the repetition
expression)
Example::
data_word = Word(alphas)
label = data_word + FollowedBy(':')
attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
text = "shape: SQUARE posn: upper left color: BLACK"
OneOrMore(attr_expr).parseString(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
# use stopOn attribute for OneOrMore to avoid reading label string as part of the data
attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
# could also be written as
(attr_expr * (1,)).parseString(text).pprint()
c C s4 t | d�r| jS | jd kr.dt| j� d | _| jS )Nr r� z}...)r; r r� r� r� )r� r r r r� � s
zOneOrMore.__str__N)r r r r� r� r r r r r6 y s c s8 e Zd ZdZd
� fdd� Zd � fdd� Zdd � Z� ZS ) rO ak Optional repetition of zero or more of the given expression.
Parameters:
- expr - expression that must match zero or more times
- stopOn - (default= ``None``) - expression for a terminating sentinel
(only required if the sentinel would ordinarily match the repetition
expression)
Example: similar to :class:`OneOrMore`
Nc s t t| �j||d� d| _d S )N)r T)r{ rO r� r� )r� r� r )r� r r r� � s zZeroOrMore.__init__Tc s6 yt t| ��|||�S ttfk
r0 |g fS X d S )N)r{ rO r� r< r" )r� r� r� r� )r� r r r� � s zZeroOrMore.parseImplc C s4 t | d�r| jS | jd kr.dt| j� d | _| jS )Nr r] z]...)r; r r� r� r� )r� r r r r� � s
zZeroOrMore.__str__)N)T)r r r r� r� r� r� r� r r )r� r rO � s
c @ s e Zd Zdd� ZeZdd� ZdS )�
_NullTokenc C s dS )NFr )r� r r r r6 � s z_NullToken.__bool__c C s dS )Nr� r )r� r r r r� � s z_NullToken.__str__N)r r r r6 r� r� r r r r r � s r c s< e Zd ZdZe� Zef� fdd� Zd dd�Zdd� Z� Z S )
r8 aG Optional matching of the given expression.
Parameters:
- expr - expression that must match zero or more times
- default (optional) - value to be returned if the optional expression is not found.
Example::
# US postal code can be a 5-digit zip, plus optional 4-digit qualifier
zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
zip.runTests('''
# traditional ZIP code
12345
# ZIP+4 form
12101-0001
# invalid ZIP
98765-
''')
prints::
# traditional ZIP code
12345
['12345']
# ZIP+4 form
12101-0001
['12101-0001']
# invalid ZIP
98765-
^
FAIL: Expected end of text (at char 5), (line:1, col:6)
c s. t t| �j|dd� | jj| _|| _d| _d S )NF)r� T)r{ r8 r� r� r� rJ r� )r� r� rD )r� r r r� � s
zOptional.__init__Tc C s| y | j j|||dd�\}}W nV ttfk
rr | j| jk rj| j jr`t| jg�}| j|| j j< qn| jg}ng }Y nX ||fS )NF)r� )r� r� r< r" rJ � _Optional__optionalNotMatchedr� r? )r� r� r� r� r� r r r r� � s
zOptional.parseImplc C s4 t | d�r| jS | jd kr.dt| j� d | _| jS )Nr r] r^ )r; r r� r� r� )r� r r r r� � s
zOptional.__str__)T)
r r r r� r r r� r� r� r� r r )r� r r8 � s
$
c s, e Zd ZdZd � fdd� Zd
dd�Z� ZS ) rE a� Token for skipping over all undefined text until the matched
expression is found.
Parameters:
- expr - target expression marking the end of the data to be skipped
- include - (default= ``False``) if True, the target expression is also parsed
(the skipped text and target expression are returned as a 2-element list).
- ignore - (default= ``None``) used to define grammars (typically quoted strings and
comments) that might contain false matches to the target expression
- failOn - (default= ``None``) define expressions that are not allowed to be
included in the skipped test; if found before the target expression is found,
the SkipTo is not a match
Example::
report = '''
Outstanding Issues Report - 1 Jan 2000
# | Severity | Description | Days Open
-----+----------+-------------------------------------------+-----------
101 | Critical | Intermittent system crash | 6
94 | Cosmetic | Spelling error on Login ('log|n') | 14
79 | Minor | System slow when running too many reports | 47
'''
integer = Word(nums)
SEP = Suppress('|')
# use SkipTo to simply match everything up until the next SEP
# - ignore quoted strings, so that a '|' character inside a quoted string does not match
# - parse action will call token.strip() for each matched token, i.e., the description body
string_data = SkipTo(SEP, ignore=quotedString)
string_data.setParseAction(tokenMap(str.strip))
ticket_expr = (integer("issue_num") + SEP
+ string_data("sev") + SEP
+ string_data("desc") + SEP
+ integer("days_open"))
for tkt in ticket_expr.searchString(report):
print tkt.dump()
prints::
['101', 'Critical', 'Intermittent system crash', '6']
- days_open: 6
- desc: Intermittent system crash
- issue_num: 101
- sev: Critical
['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
- days_open: 14
- desc: Spelling error on Login ('log|n')
- issue_num: 94
- sev: Cosmetic
['79', 'Minor', 'System slow when running too many reports', '47']
- days_open: 47
- desc: System slow when running too many reports
- issue_num: 79
- sev: Minor
FNc s` t t| ��|� || _d| _d| _|| _d| _t|t �rF| �
|�| _ n|| _ dt | j
� | _d S )NTFzNo match found for )r{ rE r� �
ignoreExprr� r� � includeMatchr� r� r r� �failOnr� r� r� )r� rS �includerN r )r� r r r� @ s
zSkipTo.__init__Tc C s, |}t |�}| j}| jj}| jd k r,| jjnd }| jd k rB| jjnd } |}
x�|
|kr�|d k rh|||
�rhP | d k r�x*y| ||
�}
W qr tk
r� P Y qrX qrW y|||
ddd� W n tt fk
r� |
d7 }
Y qLX P qLW t||| j
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}|||� } t | �} | j �r$||||dd�\}}
| |
7 } || fS )NF)r� r� r� )r� )
r� r� r� r r� r r� r: r< r" r� r? r )r� r� r� r� r� r� r� �
expr_parse�self_failOn_canParseNext�self_ignoreExpr_tryParse�tmploc�skiptext�
skipresultr� r r r r� M s<
zSkipTo.parseImpl)FNN)T)r r r r� r� r� r� r r )r� r rE s 9
c sn e Zd ZdZd� fdd� Zdd� Zdd� Zd d
� Zd d � Zdd
d�Z dd� Z
� fdd�Z d� fdd� Z � Z
S )r+ a_ Forward declaration of an expression to be defined later -
used for recursive grammars, such as algebraic infix notation.
When the expression is known, it is assigned to the ``Forward``
variable using the '<<' operator.
Note: take care when assigning to ``Forward`` not to overlook
precedence of operators.
Specifically, '|' has a lower precedence than '<<', so that::
fwdExpr << a | b | c
will actually be evaluated as::
(fwdExpr << a) | b | c
thereby leaving b and c out as parseable alternatives. It is recommended that you
explicitly group the values inserted into the ``Forward``::
fwdExpr << (a | b | c)
Converting to use the '<<=' operator instead will avoid this problem.
See :class:`ParseResults.pprint` for an example of a recursive
parser created using ``Forward``.
Nc s t t| �j|dd� d S )NF)r� )r{ r+ r� )r� rS )r� r r r� � s zForward.__init__c C sj t |t�r| �|�}|| _d | _| jj| _| jj| _| �| jj� | jj | _ | jj
| _
| j � | jj � | S )N)
r� r r� r� r� r� r� rL r� r� r� r� rO )r� rS r r r �
__lshift__� s
zForward.__lshift__c C s | |> S )Nr )r� rS r r r � __ilshift__� s zForward.__ilshift__c C s
d| _ | S )NF)r� )r� r r r rK � s zForward.leaveWhitespacec C s$ | j s d| _ | jd k r | j�� | S )NT)r� r� r )r� r r r r � s
zForward.streamlinec C sJ |d kr g }| |kr<|d d � | g }| j d k r<| j �|� | �g � d S )N)r� rV rT )r� rU r� r r r rV � s
zForward.validatec C sl t | d�r| jS | jd k r | jS d| _d}z&| jd k rJt| j�d d� }nd}W d | jjd | | _X | jS )Nr z: ...z...i� �Nonez: )r; r r� r� r� r� r )r� � retStringr r r r� � s
zForward.__str__c s. | j d k rtt| ��� S t� }|| K }|S d S )N)r� r{ r+ rR )r� r� )r� r r rR � s
z Forward.copyFc s@ t jr.| jd kr.tjd�d|t| �j�dd� tt | ��
||�S )NzR{0}: setting results name {0!r} on {1} expression that has no contained expressionr r� )r0 ) r r r� r3 r4 r� r� r r{ r+ r� )r� r r� )r� r r r� � s
zForward._setResultsName)N)N)F)r r r r� r� r' r( rK r rV r� rR r� r� r r )r� r r+ | s
c s" e Zd ZdZd� fdd� Z� ZS )rJ zW
Abstract subclass of :class:`ParseExpression`, for converting parsed results.
Fc s t t| ��|� d| _d S )NF)r{ rJ r� r� )r� r� r� )r� r r r� � s zTokenConverter.__init__)F)r r r r� r� r� r r )r� r rJ � s c s6 e Zd ZdZd
� fdd� Z� fdd�Zdd � Z� ZS ) r& a� Converter to concatenate all matching tokens to a single string.
By default, the matching patterns must also be contiguous in the
input string; this can be disabled by specifying
``'adjacent=False'`` in the constructor.
Example::
real = Word(nums) + '.' + Word(nums)
print(real.parseString('3.1416')) # -> ['3', '.', '1416']
# will also erroneously match the following
print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
real = Combine(Word(nums) + '.' + Word(nums))
print(real.parseString('3.1416')) # -> ['3.1416']
# no match when there are internal spaces
print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
r� Tc s8 t t| ��|� |r | �� || _d| _|| _d| _d S )NT)r{ r& r� rK �adjacentr� �
joinStringr� )r� r� r, r+ )r� r r r� s zCombine.__init__c s( | j rt�| |� ntt| ��|� | S )N)r+ rA rN r{ r& )r� rS )r� r r rN
s zCombine.ignorec C sP |� � }|d d �= |td�|�| j��g| jd�7 }| jrH|�� rH|gS |S d S )Nr� )r )rR r? r� r_ r, r� r� rC )r� r� r� r� �retToksr r r r� s
"zCombine.postParse)r� T)r r r r� r� rN r� r� r r )r� r r& � s
c s( e Zd ZdZ� fdd�Zdd� Z� ZS )r- a Converter to return the matched tokens as a list - useful for
returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions.
Example::
ident = Word(alphas)
num = Word(nums)
term = ident | num
func = ident + Optional(delimitedList(term))
print(func.parseString("fn a, b, 100")) # -> ['fn', 'a', 'b', '100']
func = ident + Group(Optional(delimitedList(term)))
print(func.parseString("fn a, b, 100")) # -> ['fn', ['a', 'b', '100']]
c s t t| ��|� d| _d S )NT)r{ r- r� r� )r� r� )r� r r r� * s zGroup.__init__c C s |gS )Nr )r� r� r� r� r r r r� . s zGroup.postParse)r r r r� r� r� r� r r )r� r r- s c s( e Zd ZdZ� fdd�Zdd� Z� ZS )r' a? Converter to return a repetitive expression as a list, but also
as a dictionary. Each element can also be referenced using the first
token in the expression as its key. Useful for tabular report
scraping when the first column can be used as a item key.
Example::
data_word = Word(alphas)
label = data_word + FollowedBy(':')
attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
# print attributes as plain groups
print(OneOrMore(attr_expr).parseString(text).dump())
# instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
print(result.dump())
# access named fields as dict entries, or output as dict
print(result['shape'])
print(result.asDict())
prints::
['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
[['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
- color: light blue
- posn: upper left
- shape: SQUARE
- texture: burlap
SQUARE
{'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
See more examples at :class:`ParseResults` of accessing fields by results name.
c s t t| ��|� d| _d S )NT)r{ r' r� r� )r� r� )r� r r r� X s z
Dict.__init__c C s� x�t |�D ]�\}}t|�dkr q
|d }t|t�rBt|d ��� }t|�dkr^td|�||< q
t|�dkr�t|d t�s�t|d |�||< q
|�� }|d= t|�dks�t|t�r�|� � r�t||�||< q
t|d |�||< q
W | j
r�|gS |S d S )Nr r� r� r� ) r� r� r� r� r� r� r r? rR rC r� )r� r� r� r� r� �tok�ikey� dictvaluer r r r� \ s$
zDict.postParse)r r r r� r� r� r� r r )r� r r' 1 s & c @ s e Zd ZdZdd� Zdd� ZdS )rH a[ Converter for ignoring the results of a parsed expression.
Example::
source = "a, b, c,d"
wd = Word(alphas)
wd_list1 = wd + ZeroOrMore(',' + wd)
print(wd_list1.parseString(source))
# often, delimiters that are useful during parsing are just in the
# way afterward - use Suppress to keep them out of the parsed output
wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
print(wd_list2.parseString(source))
prints::
['a', ',', 'b', ',', 'c', ',', 'd']
['a', 'b', 'c', 'd']
(See also :class:`delimitedList`.)
c C s g S )Nr )r� r� r� r� r r r r� � s zSuppress.postParsec C s | S )Nr )r� r r r rJ � s zSuppress.suppressN)r r r r� r� rJ r r r r rH u s c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) r7 zDWrapper for parse actions, to ensure they are only called once.
c C s t |�| _d| _d S )NF)r� r� �called)r� �
methodCallr r r r� � s
zOnlyOnce.__init__c C s. | j s | �|||�}d| _ |S t||d��d S )NTr� )r1 r� r< )r� r� r� r� r� r r r rI � s
zOnlyOnce.__call__c C s
d| _ d S )NF)r1 )r� r r r �reset� s zOnlyOnce.resetN)r r r r� r� rI r3 r r r r r7 � s c s: t � �� � fdd�}y � j|_W n tk
r4 Y nX |S )aq Decorator for debugging parse actions.
When the parse action is called, this decorator will print
``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
When the parse action completes, the decorator will print
``"<<"`` followed by the returned value, or any exception that the parse action raised.
Example::
wd = Word(alphas)
@traceParseAction
def remove_duplicate_chars(tokens):
return ''.join(sorted(set(''.join(tokens))))
wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
prints::
>>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
<<leaving remove_duplicate_chars (ret: 'dfjkls')
['dfjkls']
c
s� � j }| dd � \}}}t| �dkr8| d jj d | }tj�d|t||�||f � y � | � }W n8 tk
r� } ztj�d||f � � W d d }~X Y nX tj�d||f � |S )Nr� r� r �.z">>entering %s(line: '%s', %d, %r)
z <<leaving %s (exception: %s)
z<<leaving %s (ret: %r)
)r r� r� r� �stderrrj re r� )�paArgs�thisFuncr� r� r� r� r� )r\ r r �z� s ztraceParseAction.<locals>.z)r� r r� )r\ r8 r )r\ r r� � s
�,c C s` t | �d t |� d t | � d }|rBt| t|| � ��|�S | tt|�| � �|�S dS )a� Helper to define a delimited list of expressions - the delimiter
defaults to ','. By default, the list elements and delimiters can
have intervening whitespace, and comments, but this can be
overridden by passing ``combine=True`` in the constructor. If
``combine`` is set to ``True``, the matching tokens are
returned as a single token string, with the delimiters included;
otherwise, the matching tokens are returned as a list of tokens,
with the delimiters suppressed.
Example::
delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
z [r� z]...N)r� r& rO r� rH )r� �delim�combine�dlNamer r r r^ � s $c sj t � � � �fdd�}|dkr0tt��dd� �}n|�� }|�d� |j|dd� |� �d t�� d
�S ) a> Helper to define a counted list of expressions.
This helper defines a pattern of the form::
integer expr expr expr...
where the leading integer tells how many expr expressions follow.
The matched tokens returns the array of expr tokens as a list - the
leading count token is suppressed.
If ``intExpr`` is specified, it should be a pyparsing expression
that produces an integer value.
Example::
countedArray(Word(alphas)).parseString('2 ab cd ef') # -> ['ab', 'cd']
# in this parser, the leading integer value is given in binary,
# '10' indicating that 2 values are in the array
binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef') # -> ['ab', 'cd']
c s. |d }� |r t t�g| ��p&t t�> g S )Nr )r- r" ra )r� r� r� r9 )� arrayExprr� r r �countFieldParseAction� s "z+countedArray.<locals>.countFieldParseActionNc S s t | d �S )Nr )r� )r� r r r r� r� z countedArray.<locals>.<lambda>�arrayLenT)r� z(len) z...)r+ rL rp r� rR r� r� r� )r� �intExprr> r )r= r� r rZ � s
c C s: g }x0| D ](}t |t�r(|�t|�� q
|�|� q
W |S )N)r� r rO r) r� )�Lr� r� r r r r)
s
r) c s6 t � � � fdd�}| j|dd� � �dt| � � � S )a4 Helper to define an expression that is indirectly defined from
the tokens matched in a previous expression, that is, it looks for
a 'repeat' of a previous expression. For example::
first = Word(nums)
second = matchPreviousLiteral(first)
matchExpr = first + ":" + second
will match ``"1:1"``, but not ``"1:2"``. Because this
matches a previous literal, will also match the leading
``"1:1"`` in ``"1:10"``. If this is not desired, use
:class:`matchPreviousExpr`. Do *not* use with packrat parsing
enabled.
c sP |rBt |�dkr � |d > qLt|�� �}� tdd� |D ��> n
� t� > d S )Nr� r c s s | ]}t |�V qd S )N)r1 )r �ttr r r r� * s zDmatchPreviousLiteral.<locals>.copyTokenToRepeater.<locals>.<genexpr>)r� r) r r" r) )r� r� r� �tflat)�repr r �copyTokenToRepeater# s z1matchPreviousLiteral.<locals>.copyTokenToRepeaterT)r� z(prev) )r+ r� r� r� )r� rE r )rD r rm s
c sF t � � | �� }� |K � � fdd�}| j|dd� � �dt| � � � S )aT Helper to define an expression that is indirectly defined from
the tokens matched in a previous expression, that is, it looks for
a 'repeat' of a previous expression. For example::
first = Word(nums)
second = matchPreviousExpr(first)
matchExpr = first + ":" + second
will match ``"1:1"``, but not ``"1:2"``. Because this
matches by expressions, will *not* match the leading ``"1:1"``
in ``"1:10"``; the expressions are evaluated first, and then
compared, so ``"1"`` is compared with ``"10"``. Do *not* use
with packrat parsing enabled.
c s* t |�� �� � fdd�}�j|dd� d S )Nc s$ t |�� �}|� kr tddd��d S )Nr� r )r) r r< )r� r� r� � theseTokens)� matchTokensr r �mustMatchTheseTokensE s zLmatchPreviousExpr.<locals>.copyTokenToRepeater.<locals>.mustMatchTheseTokensT)r� )r) r r� )r� r� r� rH )rD )rG r rE C s z.matchPreviousExpr.<locals>.copyTokenToRepeaterT)r� z(prev) )r+ rR r� r� r� )r� �e2rE r )rD r rl 1 s c C s> x dD ]}| � |t| �} qW | � dd�} | � dd�} t| �S )Nz\^-[]r� z\nr� z\t)r� �_bslashr� )r� r� r r r r� N s
r� c s� t |t�rtjddd� |r:dd� }dd� }|r4tnt� n dd� }dd� }|rRtnt� g }t | t�rn| �� }n$t | t �r�t
| �}ntjd t dd� |s�t � S |�s2d
}x�|t
|�d k �r0|| }xjt||d d � �D ]J\} }
||
|�r�||| d = P q�|||
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� P q�W |d 7 }q�W |�s�|�s�|�r�yht
|�t
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�r� tjdt dd� Y nX t� fdd�|D ���d�|��S )a� Helper to quickly define a set of alternative Literals, and makes
sure to do longest-first testing when there is a conflict,
regardless of the input order, but returns
a :class:`MatchFirst` for best performance.
Parameters:
- strs - a string of space-delimited literals, or a collection of
string literals
- caseless - (default= ``False``) - treat all literals as
caseless
- useRegex - (default= ``True``) - as an optimization, will
generate a Regex object; otherwise, will generate
a :class:`MatchFirst` object (if ``caseless=True`` or ``asKeyword=True``, or if
creating a :class:`Regex` raises an exception)
- asKeyword - (default=``False``) - enforce Keyword-style matching on the
generated expressions
Example::
comp_oper = oneOf("< = > <= >= !=")
var = Word(alphas)
number = Word(nums)
term = var | number
comparison_expr = term + comp_oper + term
print(comparison_expr.searchString("B = 12 AA=23 B<=AA AA>12"))
prints::
[['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
z_More than one string argument passed to oneOf, pass choices as a list or space-delimited stringr� )r0 c S s | � � |� � kS )N)r� )rU �br r r r� { r� zoneOf.<locals>.<lambda>c S s |� � �| � � �S )N)r� r )rU rK r r r r� | r� c S s | |kS )Nr )rU rK r r r r� r� c S s
|� | �S )N)r )rU rK r r r r� � r� z6Invalid argument to oneOf, expected string or iterabler r� Nr� z[%s]c s s | ]}t |�V qd S )N)r� )r �symr r r r� � s zoneOf.<locals>.<genexpr>z | �|c s s | ]}t �|�V qd S )N)r� r� )r rL r r r r� � s z7Exception creating Regex for oneOf, building MatchFirstc 3 s | ]}� |�V qd S )Nr )r rL )�parseElementClassr r r� � s )r� r r3 r4 r# r$ r. r1 r� r
r r5 r4 r� r� rK r� rD r� r� r3 ) �strsr� �useRegexr� �isequal�masks�symbolsr� �curr0 rS r )rN r rq V sR
((c C s t tt| | ���S )a� Helper to easily and clearly define a dictionary by specifying
the respective patterns for the key and value. Takes care of
defining the :class:`Dict`, :class:`ZeroOrMore`, and
:class:`Group` tokens in the proper order. The key pattern
can include delimiting markers or punctuation, as long as they are
suppressed, thereby leaving the significant key text. The value
pattern can include named results, so that the :class:`Dict` results
can include named token fields.
Example::
text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
print(OneOrMore(attr_expr).parseString(text).dump())
attr_label = label
attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
# similar to Dict, but simpler call format
result = dictOf(attr_label, attr_value).parseString(text)
print(result.dump())
print(result['shape'])
print(result.shape) # object attribute access works too
print(result.asDict())
prints::
[['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
- color: light blue
- posn: upper left
- shape: SQUARE
- texture: burlap
SQUARE
SQUARE
{'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
)r' r6 r- )rI r1 r r r r_ � s %c C s^ t � �dd� �}|�� }d|_|d�| |d� }|r@dd� }ndd� }|�|� | j|_|S ) a� Helper to return the original, untokenized text for a given
expression. Useful to restore the parsed fields of an HTML start
tag into the raw tag text itself, or to revert separate tokens with
intervening whitespace back to the original matching input text. By
default, returns astring containing the original parsed text.
If the optional ``asString`` argument is passed as
``False``, then the return value is
a :class:`ParseResults` containing any results names that
were originally matched, and a single token containing the original
matched text from the input string. So if the expression passed to
:class:`originalTextFor` contains expressions with defined
results names, you must set ``asString`` to ``False`` if you
want to preserve those results name values.
Example::
src = "this is test <b> bold <i>text</i> </b> normal text "
for tag in ("b", "i"):
opener, closer = makeHTMLTags(tag)
patt = originalTextFor(opener + SkipTo(closer) + closer)
print(patt.searchString(src)[0])
prints::
['<b> bold <i>text</i> </b>']
['<i>text</i>']
c S s |S )Nr )r� r� r� r r r r� � r� z!originalTextFor.<locals>.<lambda>F�_original_start�
_original_endc S s | |j |j� S )N)rU rV )r� r� r� r r r r� � r� c S s& | |� d�|� d�� g|d d �< d S )NrU rV )rH )r� r� r� r r r � extractText� s z$originalTextFor.<locals>.extractText)r) r� rR r� r� )r� �asString� locMarker� endlocMarker� matchExprrW r r r r� � s
c C s t | ��dd� �S )zkHelper to undo pyparsing's default grouping of And expressions,
even if all but one are non-empty.
c S s | d S )Nr r )r� r r r r� r� zungroup.<locals>.<lambda>)rJ r� )r� r r r r� � s c C s4 t � �dd� �}t|d�| d� |�� �� d� �S )a� Helper to decorate a returned token with its starting and ending
locations in the input string.
This helper adds the following results names:
- locn_start = location where matched expression begins
- locn_end = location where matched expression ends
- value = the actual parsed results
Be careful if the input text contains ``<TAB>`` characters, you
may want to call :class:`ParserElement.parseWithTabs`
Example::
wd = Word(alphas)
for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
print(match)
prints::
[[0, 'ljsdf', 5]]
[[8, 'lksdjjf', 15]]
[[18, 'lkkjj', 23]]
c S s |S )Nr )r� r� r� r r r r� r� z locatedExpr.<locals>.<lambda>�
locn_startr1 �locn_end)r) r� r- rR rK )r� �locatorr r r r� s z\[]-*.$+^?()~ )r� c C s |d d S )Nr r� r )r� r� r� r r r r� ( r� r� z\\0?[xX][0-9a-fA-F]+c C s t t|d �d�d��S )Nr z\0xr� )�unichrr� rk )r� r� r� r r r r� ) r� z \\0[0-7]+c C s t t|d dd � d��S )Nr r� � )r_ r� )r� r� r� r r r r� * r� z\]r� r] r� �negate�bodyr^ c sB dd� � y d� � fdd�t�| �jD ��S tk
r< dS X dS )a Helper to easily define string ranges for use in Word
construction. Borrows syntax from regexp '[]' string range
definitions::
srange("[0-9]") -> "0123456789"
srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz"
srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
The input string must be enclosed in []'s, and the returned string
is the expanded character set joined into a single string. The
values enclosed in the []'s may be:
- a single character
- an escaped character with a leading backslash (such as ``\-``
or ``\]``)
- an escaped hex character with a leading ``'\x'``
(``\x21``, which is a ``'!'`` character) (``\0x##``
is also supported for backwards compatibility)
- an escaped octal character with a leading ``'\0'``
(``\041``, which is a ``'!'`` character)
- a range of any of the above, separated by a dash (``'a-z'``,
etc.)
- any combination of the above (``'aeiouy'``,
``'a-zA-Z0-9_$'``, etc.)
c S s< t | t�s| S d�dd� tt| d �t| d �d �D ��S )Nr� c s s | ]}t |�V qd S )N)r_ )r r� r r r r� I s z+srange.<locals>.<lambda>.<locals>.<genexpr>r r� )r� r? r� r) �ord)�pr r r r� I r� zsrange.<locals>.<lambda>r� c 3 s | ]}� |�V qd S )Nr )r �part)� _expandedr r r� K s zsrange.<locals>.<genexpr>N)r� �_reBracketExprr rb r� )r� r )rf r r} / s
c s � fdd�}|S )zoHelper method for defining parse actions that require matching at
a specific column in the input text.
c s" t || �� kr t| |d� ��d S )Nz matched token not at column %d)rW r< )r� �locnr� )r9 r r � verifyColS s z!matchOnlyAtCol.<locals>.verifyColr )r9 ri r )r9 r rk O s c s � fdd�S )a� Helper method for common parse actions that simply return
a literal value. Especially useful when used with
:class:`transformString<ParserElement.transformString>` ().
Example::
num = Word(nums).setParseAction(lambda toks: int(toks[0]))
na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
term = na | num
OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
c s � gS )Nr )r� r� r� )�replStrr r r� e r� z replaceWith.<locals>.<lambda>r )rj r )rj r rz X s
c C s |d dd� S )a Helper parse action for removing quotation marks from parsed
quoted strings.
Example::
# by default, quotation marks are included in parsed results
quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
# use removeQuotes to strip quotation marks from parsed results
quotedString.setParseAction(removeQuotes)
quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
r r� r� r )r� r� r� r r r rx g s
c sN � �fdd�}yt �dt �d�j�}W n tk
rB t��}Y nX ||_|S )aL Helper to define a parse action by mapping a function to all
elements of a ParseResults list. If any additional args are passed,
they are forwarded to the given function as additional arguments
after the token, as in
``hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))``,
which will convert the parsed data to an integer using base 16.
Example (compare the last to example in :class:`ParserElement.transformString`::
hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
hex_ints.runTests('''
00 11 22 aa FF 0a 0d 1a
''')
upperword = Word(alphas).setParseAction(tokenMap(str.upper))
OneOrMore(upperword).runTests('''
my kingdom for a horse
''')
wd = Word(alphas).setParseAction(tokenMap(str.title))
OneOrMore(wd).setParseAction(' '.join).runTests('''
now is the winter of our discontent made glorious summer by this sun of york
''')
prints::
00 11 22 aa FF 0a 0d 1a
[0, 17, 34, 170, 255, 10, 13, 26]
my kingdom for a horse
['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
now is the winter of our discontent made glorious summer by this sun of york
['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
c s � �fdd�|D �S )Nc s g | ]}�|f� �� �qS r r )r �tokn)r� r� r r r � s z(tokenMap.<locals>.pa.<locals>.<listcomp>r )r� r� r� )r� r� r r r� � s ztokenMap.<locals>.par r� )r� r r� r� )r� r� r� r� r )r� r� r r� v s $c C s t | ��� S )N)r� r� )r� r r r r� � r� c C s t | ��� S )N)r� �lower)r� r r r r� � r� rh ri c s~ t | t�r | � t| | d�} n| j� tttd �}|r�t�� � t
�}|| d� t t t
|td� | ��� tddgd�d�� d d
� � | }nlt�� � t
�ttd d �B }|| d� t t t
|� t�ttd�| � ��� tddgd�d�� d
d
� � | }ttd�| d dd�}|�d� � |�� fdd
�� |dd�� �dd��� �� � ��d� �}� |_� |_t |� �|_ ||fS )zRInternal helper to construct opening and closing tag expressions, given a tag name)r� z_-:�tag�=�/F)rD ra c S s |d dkS )Nr ro r )r� r� r� r r r r� � r� z_makeTags.<locals>.<lambda>ri )r� c S s |d dkS )Nr ro r )r� r� r� r r r r� � r� z</)r+ z<%s>c s* | � dd�� �dd��� �� � | �� �S )Nr� r� �:r� )r( r� r� �titler� rR )r� )�resnamer r r� � r� r� r� rp r� z</%s>) r� r r. r rL rR rQ r\ rR r� rx r' rO r- rH r8 rw rt r` r& �_Lr� r� r� r� rq r� rm rE �tag_body)�tagStr�xml� suppress_LT� suppress_GT� tagAttrName� tagAttrValue�openTag�closeTagr )rr r � _makeTags� s$
JR, r} c C s
t | d�S )aK Helper to construct opening and closing tag expressions for HTML,
given a tag name. Matches tags in either upper or lower case,
attributes with namespaces and with quoted or unquoted values.
Example::
text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
# makeHTMLTags returns pyparsing expressions for the opening and
# closing tags as a 2-tuple
a, a_end = makeHTMLTags("A")
link_expr = a + SkipTo(a_end)("link_text") + a_end
for link in link_expr.searchString(text):
# attributes in the <A> tag (like "href" shown here) are
# also accessible as named results
print(link.link_text, '->', link.href)
prints::
pyparsing -> https://github.com/pyparsing/pyparsing/wiki
F)r} )ru r r r ri � s c C s
t | d�S )z�Helper to construct opening and closing tag expressions for XML,
given a tag name. Matches tags only in the given upper/lower case.
Example: similar to :class:`makeHTMLTags`
T)r} )ru r r r rj � s c s8 | r| dd� � n|� � � dd� � D �� � fdd�}|S )a7 Helper to create a validating parse action to be used with start
tags created with :class:`makeXMLTags` or
:class:`makeHTMLTags`. Use ``withAttribute`` to qualify
a starting tag with a required attribute value, to avoid false
matches on common tags such as ``<TD>`` or ``<DIV>``.
Call ``withAttribute`` with a series of attribute names and
values. Specify the list of filter attributes names and values as:
- keyword arguments, as in ``(align="right")``, or
- as an explicit dict with ``**`` operator, when an attribute
name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
- a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))``
For attribute names with a namespace prefix, you must use the second
form. Attribute names are matched insensitive to upper/lower case.
If just testing for ``class`` (with or without a namespace), use
:class:`withClass`.
To verify that the attribute exists, but without specifying a value,
pass ``withAttribute.ANY_VALUE`` as the value.
Example::
html = '''
<div>
Some text
<div type="grid">1 4 0 1 0</div>
<div type="graph">1,3 2,3 1,1</div>
<div>this has no type</div>
</div>
'''
div,div_end = makeHTMLTags("div")
# only match div tag having a type attribute with value "grid"
div_grid = div().setParseAction(withAttribute(type="grid"))
grid_expr = div_grid + SkipTo(div | div_end)("body")
for grid_header in grid_expr.searchString(html):
print(grid_header.body)
# construct a match with any div tag having a type attribute, regardless of the value
div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
div_expr = div_any_type + SkipTo(div | div_end)("body")
for div_header in div_expr.searchString(html):
print(div_header.body)
prints::
1 4 0 1 0
1 4 0 1 0
1,3 2,3 1,1
Nc S s g | ]\}}||f�qS r r )r r& r# r r r r / s z!withAttribute.<locals>.<listcomp>c s^ xX� D ]P\}}||kr&t | |d| ��|tjkr|| |krt | |d||| |f ��qW d S )Nzno matching attribute z+attribute '%s' has value '%s', must be '%s')r< r� � ANY_VALUE)r� r� r� �attrName� attrValue)�attrsr r r� 0 s zwithAttribute.<locals>.pa)r, )r� �attrDictr� r )r� r r� � s 8 c C s |r d| nd}t f || i�S )a� Simplified version of :class:`withAttribute` when
matching on a div class - made difficult because ``class`` is
a reserved word in Python.
Example::
html = '''
<div>
Some text
<div class="grid">1 4 0 1 0</div>
<div class="graph">1,3 2,3 1,1</div>
<div>this <div> has no class</div>
</div>
'''
div,div_end = makeHTMLTags("div")
div_grid = div().setParseAction(withClass("grid"))
grid_expr = div_grid + SkipTo(div | div_end)("body")
for grid_header in grid_expr.searchString(html):
print(grid_header.body)
div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
div_expr = div_any_type + SkipTo(div | div_end)("body")
for div_header in div_expr.searchString(html):
print(div_header.body)
prints::
1 4 0 1 0
1 4 0 1 0
1,3 2,3 1,1
z%s:class�class)r� )� classname� namespace� classattrr r r r� : s #�(r� c C s� G dd� dt �}t� }| || | B }�x�t|�D �]r\}}|d dd� \} }
} } |
dk rdd| nd| }
|
dkr�| dks�t| �d kr�td
��| \}}t� �|
�}| tjk�rx|
d kr�||| �t|t | � � }n�|
d k�r.| dk �r||| | �t|t | | � � }n ||| �t|t |� � }nH|
dk�rn||| | | | �t|t || | | � � }ntd ��n�| tj
k�r\|
d k�r�t | t ��s�t | �} || j
| �t| | � }n�|
d k�r| dk �r�||| | �t|t | | � � }n ||| �t|t |� � }nD|
dk�rR||| | | | �t|| | | | � }ntd ��ntd
��| �r�t | ttf��r�|j| � n
|�| � ||�|
�|B K }|}q2W ||K }|S )al
Helper method for constructing grammars of expressions made up of
operators working in a precedence hierarchy. Operators may be unary
or binary, left- or right-associative. Parse actions can also be
attached to operator expressions. The generated parser will also
recognize the use of parentheses to override operator precedences
(see example below).
Note: if you define a deep operator list, you may see performance
issues when using infixNotation. See
:class:`ParserElement.enablePackrat` for a mechanism to potentially
improve your parser performance.
Parameters:
- baseExpr - expression representing the most basic element for the
nested
- opList - list of tuples, one for each operator precedence level
in the expression grammar; each tuple is of the form ``(opExpr,
numTerms, rightLeftAssoc, parseAction)``, where:
- opExpr is the pyparsing expression for the operator; may also
be a string, which will be converted to a Literal; if numTerms
is 3, opExpr is a tuple of two expressions, for the two
operators separating the 3 terms
- numTerms is the number of terms for this operator (must be 1,
2, or 3)
- rightLeftAssoc is the indicator whether the operator is right
or left associative, using the pyparsing-defined constants
``opAssoc.RIGHT`` and ``opAssoc.LEFT``.
- parseAction is the parse action to be associated with
expressions matching this operator expression (the parse action
tuple member may be omitted); if the parse action is passed
a tuple or list of functions, this is equivalent to calling
``setParseAction(*fn)``
(:class:`ParserElement.setParseAction`)
- lpar - expression for matching left-parentheses
(default= ``Suppress('(')``)
- rpar - expression for matching right-parentheses
(default= ``Suppress(')')``)
Example::
# simple example of four-function arithmetic with ints and
# variable names
integer = pyparsing_common.signed_integer
varname = pyparsing_common.identifier
arith_expr = infixNotation(integer | varname,
[
('-', 1, opAssoc.RIGHT),
(oneOf('* /'), 2, opAssoc.LEFT),
(oneOf('+ -'), 2, opAssoc.LEFT),
])
arith_expr.runTests('''
5+3*6
(5+3)*6
-2--11
''', fullDump=False)
prints::
5+3*6
[[5, '+', [3, '*', 6]]]
(5+3)*6
[[[5, '+', 3], '*', 6]]
-2--11
[[['-', 2], '-', ['-', 11]]]
c @ s e Zd Zddd�ZdS )zinfixNotation.<locals>._FBTc S s | j �||� |g fS )N)r� r� )r� r� r� r� r r r r� � s z$infixNotation.<locals>._FB.parseImplN)T)r r r r� r r r r �_FB� s r� )NNr� r� z%s termz %s%s termr� z@if numterms=3, opExpr must be a tuple or list of two expressionsr� z6operator must be unary (1), binary (2), or ternary (3)z2operator must indicate right or left associativity)r* r+ r� r� r< r� rr �LEFTr- r6 �RIGHTr� r8 r� r; r r� )�baseExpr�opList�lpar�rparr� r� �lastExprr� �operDef�opExpr�arity�rightLeftAssocr� �termName�opExpr1�opExpr2�thisExprr[ r r r r� d sZ H
&
&
z4"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*�"z string enclosed in double quotesz4'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*�'z string enclosed in single quotesz*quotedString using single or double quotes�uzunicode string literalc C s� | |krt d��|dk�r*t| t��r"t|t��r"t| �dkr�t|�dkr�|dk r�tt| t| | tj dd� ��� dd� �}n$t
� � t| | tj �� dd� � }nx|dk r�tt| t | � t |� ttjdd� ��� dd� �}n4ttt | � t |� ttjdd� ��� d d� �}nt d
��t
� }|dk �rd|tt| �t||B |B � t|� �K }n$|tt| �t||B � t|� �K }|�d | |f � |S ) a� Helper method for defining nested lists enclosed in opening and
closing delimiters ("(" and ")" are the default).
Parameters:
- opener - opening character for a nested list
(default= ``"("``); can also be a pyparsing expression
- closer - closing character for a nested list
(default= ``")"``); can also be a pyparsing expression
- content - expression for items within the nested lists
(default= ``None``)
- ignoreExpr - expression for ignoring opening and closing
delimiters (default= :class:`quotedString`)
If an expression is not provided for the content argument, the
nested expression will capture all whitespace-delimited content
between delimiters as a list of separate values.
Use the ``ignoreExpr`` argument to define expressions that may
contain opening or closing characters that should not be treated as
opening or closing characters for nesting, such as quotedString or
a comment expression. Specify multiple expressions using an
:class:`Or` or :class:`MatchFirst`. The default is
:class:`quotedString`, but if no expressions are to be ignored, then
pass ``None`` for this argument.
Example::
data_type = oneOf("void int short long char float double")
decl_data_type = Combine(data_type + Optional(Word('*')))
ident = Word(alphas+'_', alphanums+'_')
number = pyparsing_common.number
arg = Group(decl_data_type + ident)
LPAR, RPAR = map(Suppress, "()")
code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
c_function = (decl_data_type("type")
+ ident("name")
+ LPAR + Optional(delimitedList(arg), [])("args") + RPAR
+ code_body("body"))
c_function.ignore(cStyleComment)
source_code = '''
int is_odd(int x) {
return (x%2);
}
int dec_to_hex(char hchar) {
if (hchar >= '0' && hchar <= '9') {
return (ord(hchar)-ord('0'));
} else {
return (10+ord(hchar)-ord('A'));
}
}
'''
for func in c_function.searchString(source_code):
print("%(name)s (%(type)s) args: %(args)s" % func)
prints::
is_odd (int) args: [['int', 'x']]
dec_to_hex (int) args: [['char', 'hchar']]
z.opening and closing strings cannot be the sameNr� )r� c S s | d � � S )Nr )r� )r� r r r r� ; r� z nestedExpr.<locals>.<lambda>c S s | d � � S )Nr )r� )r� r r r r� @ r� c S s | d � � S )Nr )r� )r� r r r r� G r� c S s | d � � S )Nr )r� )r� r r r r� L r� zOopening and closing arguments must be strings if no content expression is givenznested %s%s expression)r< r� r r� r& r6 r% rA r� r� ra rR r1 r+ r- rH rO r� )�opener�closer�contentr r� r r r rn � s6 A
, &
*$c s& �dd� � � �fdd���fdd�}�fdd�}�fdd �}t t� �d
��� t� d �}t� t� �|� �d �}t� �|��d
�}t� �|��d�} |r�tt |�| t |t| � t |� t� d � | �}
n.tt |�t |t| � t |� t� d � | �}
|
�
�fdd�� | � t t� � |
�d�S )a� Helper method for defining space-delimited indentation blocks,
such as those used to define block statements in Python source code.
Parameters:
- blockStatementExpr - expression defining syntax of statement that
is repeated within the indented block
- indentStack - list created by caller to manage indentation stack
(multiple statementWithIndentedBlock expressions within a single
grammar should share a common indentStack)
- indent - boolean indicating whether block must be indented beyond
the current level; set to False for block of left-most
statements (default= ``True``)
A valid block must contain at least one ``blockStatement``.
Example::
data = '''
def A(z):
A1
B = 100
G = A2
A2
A3
B
def BB(a,b,c):
BB1
def BBA():
bba1
bba2
bba3
C
D
def spam(x,y):
def eggs(z):
pass
'''
indentStack = [1]
stmt = Forward()
identifier = Word(alphas, alphanums)
funcDecl = ("def" + identifier + Group("(" + Optional(delimitedList(identifier)) + ")") + ":")
func_body = indentedBlock(stmt, indentStack)
funcDef = Group(funcDecl + func_body)
rvalue = Forward()
funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
rvalue << (funcCall | identifier | Word(nums))
assignment = Group(identifier + "=" + rvalue)
stmt << (funcDef | assignment | identifier)
module_body = OneOrMore(stmt)
parseTree = module_body.parseString(data)
parseTree.pprint()
prints::
[['def',
'A',
['(', 'z', ')'],
':',
[['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
'B',
['def',
'BB',
['(', 'a', 'b', 'c', ')'],
':',
[['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
'C',
'D',
['def',
'spam',
['(', 'x', 'y', ')'],
':',
[[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]]
Nc s � �d d �< d S )Nr r )� backup_stack� indentStackr r � reset_stack� s z"indentedBlock.<locals>.reset_stackc sN |t | �krd S t|| �}|� d krJ|� d kr>t| |d��t| |d��d S )Nr� zillegal nestingznot a peer entry)r� rW r< )r� r� r� �curCol)r� r r �checkPeerIndent� s
z&indentedBlock.<locals>.checkPeerIndentc s2 t || �}|� d kr"� �|� n t| |d��d S )Nr� znot a subentry)rW r� r< )r� r� r� r� )r� r r �checkSubIndent� s
z%indentedBlock.<locals>.checkSubIndentc sJ |t | �krd S t|| �}� r&|� ks2t| |d��|� d k rF� �� d S )Nznot an unindentr� )r� rW r< rH )r� r� r� r� )r� r r �
checkUnindent� s
z$indentedBlock.<locals>.checkUnindentz )r �INDENTr� �UNINDENTc s � � S )Nr )rU rK r� r� )r� r r r� � r� z indentedBlock.<locals>.<lambda>zindented block)
r6 r/ rL rJ rF r) r� r� r- r8 r� rN rJ ) �blockStatementExprr� rm r� r� r� r� r� �PEER�UNDENT�smExprr )r� r� r� r r� W s" Q 2,z#[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]z[\0xa1-\0xbf\0xd7\0xf7]z_:zany tagzgt lt amp nbsp quot aposz><& "'z &(?P<entity>rM z);zcommon HTML entityc C s t �| j�S )zRHelper parser action to replace common HTML entities with their special characters)�_htmlEntityMapr� �entity)r� r r r ry � s z/\*(?:[^*]|\*(?!/))*z*/zC style commentz<!--[\s\S]*?-->z HTML commentz.*z rest of linez//(?:\\\n|[^\n])*z
// commentzC++ style commentz#.*zPython style comment)r� z � commaItem)rD c @ s� e Zd ZdZee�Zee�Ze e
�� d�� e�Z
e e�� d�� eed��Zed�� d�� e�Ze� � e�d e� � e� � d�Ze�d d
� � eeeed ��� e � B � d �Ze�e� ed
�� d�� e�Zed�� d�� e�ZeeB eB �� Zed�� d�� e�Z e e d e d �� d�Z ed�� d�Z ed�� d�Z!e!de! d � d�Z"ee!de! d �d ee!de! d � � d �Z#e#�$d d
� � d e � d!�Z%e&e"e%B e#B � d"��� d"�Z'ed#�� d$�Z(e)d=d&d'��Z*e)d>d)d*��Z+ed+�� d,�Z,ed-�� d.�Z-ed/�� d0�Z.e/�� e0�� B Z1e)d1d2� �Z2e&e3e4d3� e5� e e6d3d4� ee7d5�� ���� � d6�Z8e9ee:�;� e8B d7d8��� d9�Z<e)ed:d
� ��Z=e)ed;d
� ��Z>d<S )?r� a Here are some common low-level expressions that may be useful in
jump-starting parser development:
- numeric forms (:class:`integers<integer>`, :class:`reals<real>`,
:class:`scientific notation<sci_real>`)
- common :class:`programming identifiers<identifier>`
- network addresses (:class:`MAC<mac_address>`,
:class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
- ISO8601 :class:`dates<iso8601_date>` and
:class:`datetime<iso8601_datetime>`
- :class:`UUID<uuid>`
- :class:`comma-separated list<comma_separated_list>`
Parse actions:
- :class:`convertToInteger`
- :class:`convertToFloat`
- :class:`convertToDate`
- :class:`convertToDatetime`
- :class:`stripHTMLTags`
- :class:`upcaseTokens`
- :class:`downcaseTokens`
Example::
pyparsing_common.number.runTests('''
# any int or real number, returned as the appropriate type
100
-100
+100
3.14159
6.02e23
1e-12
''')
pyparsing_common.fnumber.runTests('''
# any int or real number, returned as float
100
-100
+100
3.14159
6.02e23
1e-12
''')
pyparsing_common.hex_integer.runTests('''
# hex numbers
100
FF
''')
pyparsing_common.fraction.runTests('''
# fractions
1/2
-3/4
''')
pyparsing_common.mixed_integer.runTests('''
# mixed fractions
1
1/2
-3/4
1-3/4
''')
import uuid
pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
pyparsing_common.uuid.runTests('''
# uuid
12345678-1234-5678-1234-567812345678
''')
prints::
# any int or real number, returned as the appropriate type
100
[100]
-100
[-100]
+100
[100]
3.14159
[3.14159]
6.02e23
[6.02e+23]
1e-12
[1e-12]
# any int or real number, returned as float
100
[100.0]
-100
[-100.0]
+100
[100.0]
3.14159
[3.14159]
6.02e23
[6.02e+23]
1e-12
[1e-12]
# hex numbers
100
[256]
FF
[255]
# fractions
1/2
[0.5]
-3/4
[-0.75]
# mixed fractions
1
[1]
1/2
[0.5]
-3/4
[-0.75]
1-3/4
[1.75]
# uuid
12345678-1234-5678-1234-567812345678
[UUID('12345678-1234-5678-1234-567812345678')]
�integerz hex integerr� z[+-]?\d+zsigned integerro �fractionc C s | d | d S )Nr r� r )r� r r r r� � r� zpyparsing_common.<lambda>r� z"fraction or mixed integer-fractionz[+-]?(?:\d+\.\d*|\.\d+)z real numberz@[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)z$real number with scientific notationz [+-]?\d+\.?\d*([eE][+-]?\d+)?�fnumberr �
identifierzK(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}z IPv4 addressz[0-9a-fA-F]{1,4}� hex_integerrp � zfull IPv6 address)r r� z::zshort IPv6 addressc C s t dd� | D ��dk S )Nc s s | ]}t j�|�rd V qdS )r� N)r� �
_ipv6_partr$ )r rB r r r r� � s z,pyparsing_common.<lambda>.<locals>.<genexpr>r` )r� )r� r r r r� � r� z::ffff:zmixed IPv6 addressz IPv6 addressz:[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}z MAC address�%Y-%m-%dc s � fdd�}|S )a�
Helper to create a parse action for converting parsed date string to Python datetime.date
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
Example::
date_expr = pyparsing_common.iso8601_date.copy()
date_expr.setParseAction(pyparsing_common.convertToDate())
print(date_expr.parseString("1999-12-31"))
prints::
[datetime.date(1999, 12, 31)]
c
sL yt �|d � ��� S tk
rF } zt| |t|���W d d }~X Y nX d S )Nr )r �strptime�dater< r< r� )r� r� r� �ve)�fmtr r �cvt_fn� s z.pyparsing_common.convertToDate.<locals>.cvt_fnr )r� r� r )r� r �
convertToDate� s z pyparsing_common.convertToDate�%Y-%m-%dT%H:%M:%S.%fc s � fdd�}|S )a Helper to create a parse action for converting parsed
datetime string to Python datetime.datetime
Params -
- fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
Example::
dt_expr = pyparsing_common.iso8601_datetime.copy()
dt_expr.setParseAction(pyparsing_common.convertToDatetime())
print(dt_expr.parseString("1999-12-31T23:59:59.999"))
prints::
[datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
c
sH yt �|d � �S tk
rB } zt| |t|���W d d }~X Y nX d S )Nr )r r� r< r< r� )r� r� r� r� )r� r r r� � s z2pyparsing_common.convertToDatetime.<locals>.cvt_fnr )r� r� r )r� r �convertToDatetime� s z"pyparsing_common.convertToDatetimez7(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?z ISO8601 datez�(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?zISO8601 datetimez2[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}�UUIDc C s t j�|d �S )a Parse action to remove HTML tags from web page HTML source
Example::
# strip HTML links from normal text
text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
td, td_end = makeHTMLTags("TD")
table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
print(table_text.parseString(text).body)
Prints::
More info at the pyparsing wiki page
r )r� �_html_stripperr� )r� r� r� r r r �
stripHTMLTags s z pyparsing_common.stripHTMLTagsr9 )r� z r� r� )rD zcomma separated listc C s t | ��� S )N)r� r� )r� r r r r� # r� c C s t | ��� S )N)r� rl )r� r r r r� & r� N)r� )r� )?r r r r� r� r� �convertToInteger�float�convertToFloatrL rp r� r� r� rb r� rD �signed_integerr� r� r8 rJ �
mixed_integerr� �real�sci_realr �numberr� rR rQ r� � ipv4_addressr� �_full_ipv6_address�_short_ipv6_addressr� �_mixed_ipv6_addressr& � ipv6_address� mac_addressr r� r� � iso8601_date�iso8601_datetime�uuidrU rT r� r� r6 r1 r/ rt rK �
_commasepitemr^ rw rR �comma_separated_listr� r` r r r r r� � sT ""
, 8
c @ s e Zd Zdd� Zdd� ZdS )�_lazyclasspropertyc C s || _ |j| _|j| _d S )N)r� r� r )r� r� r r r r� + s z_lazyclassproperty.__init__c sl � d krt |�� t� d�r:t� fdd�� jdd � D ��r@i � _| jj}|� jkrb| �� �� j|< � j| S )N�_internc 3 s | ]}� j t|d g �kV qdS )r� N)r� r� )r �
superclass)r� r r r� 3 s z-_lazyclassproperty.__get__.<locals>.<genexpr>r� )r� r; r� �__mro__r� r� r )r� r� r� �attrnamer )r� r �__get__0 s
z_lazyclassproperty.__get__N)r r r r� r� r r r r r� * s r� c @ sP e Zd ZdZg Zedd� �Zedd� �Zedd� �Z edd � �Z
ed
d � �Z d S )
r� a�
A set of Unicode characters, for language-specific strings for
``alphas``, ``nums``, ``alphanums``, and ``printables``.
A unicode_set is defined by a list of ranges in the Unicode character
set, in a class attribute ``_ranges``, such as::
_ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
A unicode set can also be defined using multiple inheritance of other unicode sets::
class CJK(Chinese, Japanese, Korean):
pass
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A namespace class for defining common language unicode_sets.
� c @ s e Zd ZdZddgZdS )zpyparsing_unicode.Latin1z/Unicode set for Latin-1 Unicode Character Range)r� �~ )� � N)r r r r� r� r r r r �Latin1q s r� c @ s e Zd ZdZdgZdS )zpyparsing_unicode.LatinAz/Unicode set for Latin-A Unicode Character Range)� i N)r r r r� r� r r r r �LatinAu s r� c @ s e Zd ZdZdgZdS )zpyparsing_unicode.LatinBz/Unicode set for Latin-B Unicode Character Range)i� iO N)r r r r� r� r r r r �LatinBy s r� c @ s6 e Zd ZdZdddddddd d
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dddddgZdS )zpyparsing_unicode.Greekz.Unicode set for Greek Unicode Character Ranges)ip i� )i i )i i )i iE )iH iM )iP iW )iY )i[ )i] )i_ i} )i� i� )i� i� )i� i� )i� i� )i� i� )i� i� )i� i� N)r r r r� r� r r r r �Greek} s
r� c @ s e Zd ZdZdgZdS )zpyparsing_unicode.Cyrillicz0Unicode set for Cyrillic Unicode Character Range)i i� N)r r r r� r� r r r r �Cyrillic� s r� c @ s e Zd ZdZddgZdS )zpyparsing_unicode.Chinesez/Unicode set for Chinese Unicode Character Range)i N i�� )i 0 i?0 N)r r r r� r� r r r r �Chinese� s r� c @ sD e Zd ZdZg ZG dd� de�ZG dd� de�ZG dd� de�ZdS ) zpyparsing_unicode.Japanesez`Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana rangesc @ s e Zd ZdZddgZdS )z pyparsing_unicode.Japanese.Kanjiz-Unicode set for Kanji Unicode Character Range)i N i�� )i 0 i?0 N)r r r r� r� r r r r �Kanji� s r� c @ s e Zd ZdZdgZdS )z#pyparsing_unicode.Japanese.Hiraganaz0Unicode set for Hiragana Unicode Character Range)i@0 i�0 N)r r r r� r� r r r r �Hiragana� s r� c @ s e Zd ZdZdgZdS )z#pyparsing_unicode.Japanese.Katakanaz1Unicode set for Katakana Unicode Character Range)i�0 i�0 N)r r r r� r� r r r r �Katakana� s r� N) r r r r� r� r� r� r� r� r r r r �Japanese� s
r� c @ s e Zd ZdZddddddgZdS ) zpyparsing_unicode.Koreanz.Unicode set for Korean Unicode Character Range)i � i�� )i i� )i01 i�1 )i`� i� )i�� i�� )i 0 i?0 N)r r r r� r� r r r r �Korean� s r� c @ s e Zd ZdZdS )zpyparsing_unicode.CJKzTUnicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character RangeN)r r r r� r r r r �CJK� s r� c @ s e Zd ZdZddgZdS )zpyparsing_unicode.Thaiz,Unicode set for Thai Unicode Character Range)i i: )i? i[ N)r r r r� r� r r r r �Thai� s r� c @ s e Zd ZdZdddgZdS )zpyparsing_unicode.Arabicz.Unicode set for Arabic Unicode Character Range)i i )i i� )i i N)r r r r� r� r r r r �Arabic� s r� c @ s e Zd ZdZdgZdS )zpyparsing_unicode.Hebrewz.Unicode set for Hebrew Unicode Character Range)i� i� N)r r r r� r� r r r r �Hebrew� s r� c @ s e Zd ZdZddgZdS )z pyparsing_unicode.Devanagariz2Unicode set for Devanagari Unicode Character Range)i i )i� i�� N)r r r r� r� r r r r �
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namespace class for classes useful in writing unit tests
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Context manager to be used when writing unit tests that modify pyparsing config values:
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- literal string auto-conversion class
- __diag__ settings
Example:
with reset_pyparsing_context():
# test that literals used to construct a grammar are automatically suppressed
ParserElement.inlineLiteralsUsing(Suppress)
term = Word(alphas) | Word(nums)
group = Group('(' + term[...] + ')')
# assert that the '()' characters are not included in the parsed tokens
self.assertParseAndCheckLisst(group, "(abc 123 def)", ['abc', '123', 'def'])
# after exiting context manager, literals are converted to Literal expressions again
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A mixin class to add parse results assertion methods to normal unittest.TestCase classes.
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Convenience wrapper assert to test a parser element and input string, and assert that
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Unit test assertion to evaluate output of ParserElement.runTests(). If a list of
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Finally, asserts that the overall runTests() success value is True.
:param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests
:param expected_parse_results (optional): [tuple(str, list, dict, Exception)]
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