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Wrapper for built-in object types that are allow setuptools to identify
static core metadata (in opposition to ``Dynamic``, as defined :pep:`643`).
The trick is to mark values with :class:`Static` when they come from
``pyproject.toml`` or ``setup.cfg``, so if any plugin overwrite the value
with a built-in, setuptools will be able to recognise the change.
We inherit from built-in classes, so that we don't need to change the existing
code base to deal with the new types.
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initial parsing.
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Traceback (most recent call last):
SetuptoolsDeprecationWarning: Direct modification ...
>>> is_static(x) # no longer static after modification
False
>>> y = list(x)
>>> y.clear()
>>> y
[]
>>> y == x
False
>>> is_static(List(y))
True
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Traceback (most recent call last):
SetuptoolsDeprecationWarning: Direct modification ...
>>> x._mutated_
True
>>> is_static(x) # no longer static after modification
False
>>> y = dict(x)
>>> y.popitem()
('b', 2)
>>> y == x
False
>>> is_static(Dict(y))
True
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42
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>>> is_static(attempt_conversion("hello"))
True
>>> is_static(object())
False
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