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bpo-46244: Remove __slots__ from typing.TypeVar, .ParamSpec #30444

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Merged
merged 5 commits into from
Jan 10, 2022
Merged

bpo-46244: Remove __slots__ from typing.TypeVar, .ParamSpec #30444

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f3362f4
add missing __slots__ to typing._TypeVarLike
ariebovenberg Jan 6, 2022
4cd5d2e
add news entry
ariebovenberg Jan 6, 2022
2c9f75e
remove slots from _TypeVarLike base classes
ariebovenberg Jan 10, 2022
e6f9966
cleanup diff
ariebovenberg Jan 10, 2022
34ec10c
fix broken link in blurb
ariebovenberg Jan 10, 2022
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add missing __slots__ to typing._TypeVarLike
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@ariebovenberg
ariebovenberg committed Jan 6, 2022
commit f3362f4df51bf4e744e521a24b4cf6eaf24c05cf
9 changes: 5 additions & 4 deletions Lib/typing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -729,6 +729,9 @@ def __repr__(self):

class _TypeVarLike:
"""Mixin for TypeVar-like types (TypeVar and ParamSpec)."""

__slots__ = ('__name__', '__bound__', '__covariant__', '__contravariant__')

def __init__(self, bound, covariant, contravariant):
"""Used to setup TypeVars and ParamSpec's bound, covariant and
contravariant attributes.
Expand Down Expand Up @@ -805,8 +808,7 @@ def longest(x: A, y: A) -> A:
Note that only type variables defined in global scope can be pickled.
"""

__slots__ = ('__name__', '__bound__', '__constraints__',
'__covariant__', '__contravariant__', '__dict__')
__slots__ = ('__constraints__', '__dict__')

def __init__(self, name, *constraints, bound=None,
covariant=False, contravariant=False):
Expand Down Expand Up @@ -907,8 +909,7 @@ def add_two(x: float, y: float) -> float:
be pickled.
"""

__slots__ = ('__name__', '__bound__', '__covariant__', '__contravariant__',
'__dict__')
__slots__ = ('__dict__', )

@property
def args(self):
Expand Down