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bpo-39674: Revert "bpo-25988: Do not expose abstract collection classes in the collections module. (GH-10596)" (GH-18545)

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This reverts commit ef092fe990.

Update collections __getattr__() and documentation to defer aliases
removal to Python 3.10.
This commit is contained in:
Victor Stinner 2020-02-18 16:28:53 +01:00 • committed by GitHub
parent 6e35da9763
commit af5ee3ff61
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4 changed files with 20 additions and 6 deletions
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15
Lib/collections/__init__.py
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@ -39,6 +39,21 @@ except ImportError:
pass
def __getattr__(name):
# For backwards compatibility, continue to make the collections ABCs
# through Python 3.6 available through the collections module.
# Note, no new collections ABCs were added in Python 3.7
if name in _collections_abc.__all__:
obj = getattr(_collections_abc, name)
import warnings
warnings.warn("Using or importing the ABCs from 'collections' instead "
"of from 'collections.abc' is deprecated since Python 3.3, "
"and in 3.10 it will stop working",
DeprecationWarning, stacklevel=2)
globals()[name] = obj
return obj
raise AttributeError(f'module {__name__!r} has no attribute {name!r}')
################################################################################
### OrderedDict
################################################################################