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Code Issues Projects Releases Packages Wiki Activity Actions 11

bpo-46014: Add docs regarding functools.singledispatch changes in 3.11 (#32282)

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Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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Yurii Karabas 2022-04-19 05:50:59 +03:00 • committed by GitHub
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21
Doc/library/functools.rst
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@ -436,6 +436,23 @@ The :mod:`functools` module defines the following functions:
... for i, elem in enumerate(arg): ... for i, elem in enumerate(arg):
... print(i, elem) ... print(i, elem)
:data:`types.UnionType` and :data:`typing.Union` can also be used::
>>> @fun.register
... def _(arg: int | float, verbose=False):
... if verbose:
... print("Strength in numbers, eh?", end=" ")
... print(arg)
...
>>> from typing import Union
>>> @fun.register
... def _(arg: Union[list, set], verbose=False):
... if verbose:
... print("Enumerate this:")
... for i, elem in enumerate(arg):
... print(i, elem)
...
For code which doesn't use type annotations, the appropriate type For code which doesn't use type annotations, the appropriate type
argument can be passed explicitly to the decorator itself:: argument can be passed explicitly to the decorator itself::
@ -535,6 +552,10 @@ The :mod:`functools` module defines the following functions:
.. versionchanged:: 3.7 .. versionchanged:: 3.7
The :func:`register` attribute now supports using type annotations. The :func:`register` attribute now supports using type annotations.
.. versionchanged:: 3.11
The :func:`register` attribute now supports :data:`types.UnionType`
and :data:`typing.Union` as type annotations.
.. class:: singledispatchmethod(func) .. class:: singledispatchmethod(func)

30
Doc/whatsnew/3.11.rst
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@ -267,6 +267,36 @@ fractions
that an ``isinstance(some_fraction, typing.SupportsInt)`` check passes. that an ``isinstance(some_fraction, typing.SupportsInt)`` check passes.
(Contributed by Mark Dickinson in :issue:`44547`.) (Contributed by Mark Dickinson in :issue:`44547`.)
functools
---------
* :func:`functools.singledispatch` now supports :data:`types.UnionType`
and :data:`typing.Union` as annotations to the dispatch argument.::
>>> from functools import singledispatch
>>> @singledispatch
... def fun(arg, verbose=False):
... if verbose:
... print("Let me just say,", end=" ")
... print(arg)
...
>>> @fun.register
... def _(arg: int | float, verbose=False):
... if verbose:
... print("Strength in numbers, eh?", end=" ")
... print(arg)
...
>>> from typing import Union
>>> @fun.register
... def _(arg: Union[list, set], verbose=False):
... if verbose:
... print("Enumerate this:")
... for i, elem in enumerate(arg):
... print(i, elem)
...
(Contributed by Yurii Karabas in :issue:`46014`.)
hashlib hashlib
------- -------