[Python-checkins] bpo-36953: Delay removal of ABCs from collections. (GH-13409)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/056fa7f52a49a758b1ed5f5a81d8b7ce5c71cec4
commit: 056fa7f52a49a758b1ed5f5a81d8b7ce5c71cec4
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-10-09T02:29:31-07:00
summary:

bpo-36953: Delay removal of ABCs from collections. (GH-13409)


Bump the removal to 3.9, indicate collections.abc available since 3.3,
replace version-changed directive to deprecated-removed.

https://bugs.python.org/issue36953
(cherry picked from commit eea47e09394dfb64d3a59a601d947d25bb1bdc96)

Co-authored-by: Matthias Bussonnier <mbussonnier at ucmerced.edu>

files:
A Misc/NEWS.d/next/Library/2019-05-20-08-54-41.bpo-36952.I_glok.rst
M Doc/library/collections.rst
M Lib/collections/__init__.py

diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 9f47e8978da35..e9dbd094e0a96 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -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
diff --git a/Lib/collections/__init__.py b/Lib/collections/__init__.py
index 7ff3c80a06a7e..d353ff2b6f127 100644
--- a/Lib/collections/__init__.py
+++ b/Lib/collections/__init__.py
@@ -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
diff --git a/Misc/NEWS.d/next/Library/2019-05-20-08-54-41.bpo-36952.I_glok.rst b/Misc/NEWS.d/next/Library/2019-05-20-08-54-41.bpo-36952.I_glok.rst
new file mode 100644
index 0000000000000..eeb4fd71e67bf
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-05-20-08-54-41.bpo-36952.I_glok.rst
@@ -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.