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[3.7] bpo-36953: Delay removal of ABCs from collections. (GH-13409) by miss-islington · Pull Request #16675 · python/cpython · GitHub

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[3.7] bpo-36953: Delay removal of ABCs from collections. (GH-13409) #16675

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miss-islington merged 1 commit into from
Oct 9, 2019
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[3.7] bpo-36953: Delay removal of ABCs from collections. (GH-13409) #16675

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4 changes: 2 additions & 2 deletions Doc/library/collections.rst
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Expand Up @@ -33,10 +33,10 @@ Python's general purpose built-in containers, :class:`dict`, :class:`list`,
:class:`UserString` wrapper around string objects for easier string subclassing
===================== ====================================================================

.. versionchanged:: 3.3
.. deprecated-removed:: 3.3 3.9
Moved :ref:`collections-abstract-base-classes` to the :mod:`collections.abc` module.
For backwards compatibility, they continue to be visible in this module through
Python 3.7. Subsequently, they will be removed entirely.
Python 3.8.


:class:`ChainMap` objects
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4 changes: 2 additions & 2 deletions Lib/collections/__init__.py
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Expand Up @@ -47,8 +47,8 @@ def __getattr__(name):
obj = getattr(_collections_abc, name)
import warnings
warnings.warn("Using or importing the ABCs from 'collections' instead "
"of from 'collections.abc' is deprecated, "
"and in 3.8 it will stop working",
"of from 'collections.abc' is deprecated since Python 3.3,"
"and in 3.9 it will stop working",
DeprecationWarning, stacklevel=2)
globals()[name] = obj
return obj
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5 changes: 5 additions & 0 deletions Misc/NEWS.d/next/Library/2019-05-20-08-54-41.bpo-36952.I_glok.rst
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@@ -0,0 +1,5 @@
Starting with Python 3.3, importing ABCs from :mod:`collections` is
deprecated, and import should be done from :mod:`collections.abc`. Still
being able to import from :mod:`collections` was marked for removal in 3.8,
but has been delayed to 3.9; documentation and ``DeprecationWarning``
clarified.
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