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

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Merged
merged 1 commit into from
Feb 18, 2020
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bpo-39674: Revert "bpo-25988: Do not expose abstract collection classes in the collections module. (GH-10596)" #18545

merged 1 commit into from
Feb 18, 2020

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vstinner
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@vstinner vstinner commented Feb 18, 2020 •
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This reverts commit ef092fe.

Update collections getattr() and documentation to defer aliases
removal to Python 3.10.

https://bugs.python.org/issue39674

@vstinner vstinner requested a review from rhettinger as a code owner February 18, 2020 11:29
@vstinner
bpo-39674: Revert "bpo-25988: Do not expose abstract collection class…
23383c6 
…es in the collections module. (GH-10596)"

This reverts commit ef092fe.

Update collections __getattr__() and documentation to defer aliases
removal to Python 3.10.
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Since https://bugs.python.org/issue39674 is controversial, I would prefer to get at least one formal approval of this revert from core developers.

cc @brettcannon @warsaw @serhiy-storchaka @gvanrossum @zooba

serhiy-storchaka
serhiy-storchaka approved these changes Feb 18, 2020
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LGTM. I do not care about other removals, but this change looks affecting too much code.

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codecov bot commented Feb 18, 2020 •
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Codecov Report

Merging #18545 into master will decrease coverage by 1.13%.
The diff coverage is n/a.

Impacted file tree graph

@@             Coverage Diff             @@
##           master   #18545       +/-   ##
===========================================
- Coverage   83.25%   82.12%    -1.14%     
===========================================
  Files        1571     1955      +384     
  Lines      414749   584050   +169301     
  Branches    44456    44457        +1     
===========================================
+ Hits       345302   479622   +134320     
- Misses      59795    94780    +34985     
+ Partials     9652     9648        -4
Impacted Files Coverage Δ
Lib/distutils/tests/test_bdist_rpm.py 30.00% <0.00%> (-65.00%) ⬇️
Lib/distutils/command/bdist_rpm.py 7.63% <0.00%> (-56.88%) ⬇️
Lib/test/test_urllib2net.py 76.92% <0.00%> (-13.85%) ⬇️
Lib/test/test_smtpnet.py 78.57% <0.00%> (-7.15%) ⬇️
Lib/ftplib.py 63.85% <0.00%> (-6.06%) ⬇️
Lib/test/test_ftplib.py 87.11% <0.00%> (-4.72%) ⬇️
Tools/scripts/db2pickle.py 17.82% <0.00%> (-3.97%) ⬇️
Tools/scripts/pickle2db.py 16.98% <0.00%> (-3.78%) ⬇️
Lib/test/test_socket.py 71.94% <0.00%> (-3.77%) ⬇️
Lib/test/test_asyncio/test_base_events.py 91.84% <0.00%> (-3.30%) ⬇️
... and 436 more

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Data point from Fedora packages: around 65 packages failed to build because of commit ef092fe which removed the collections aliases.

See Miro's email: https://mail.python.org/archives/list/python-dev@python.org/message/LGGI42UEQMJVNW2ZHEP473Z7ZQ5BDBPL/

This revert should fix most of these packages. "most" because we don't know if packages build will fail for another reasons (maybe another deprecated function removed from Python 3.9).

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Fedora packages reported failures to most packages upstream and for some of them, we even proposed fixes.

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The macOS failure is: https://bugs.python.org/issue38691

@vstinner vstinner merged commit af5ee3f into python:master Feb 18, 2020
@vstinner vstinner deleted the revert_collections_abc branch February 18, 2020 15:28
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Merged, thanks for the approval @serhiy-storchaka and @gvanrossum.

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Shouldn't '3.8' in
"For backwards compatibility, they continue to be visible in this module through Python 3.8."
be changed to '3.9'?

FWIW, I also think this 1 reversion was the best thing to do and perhaps had more support than revert nothing and revert multiple things.

@hugovk hugovk mentioned this pull request Mar 1, 2020
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vstinner commented Mar 2, 2020

Shouldn't '3.8' in "For backwards compatibility, they continue to be visible in this module through Python 3.8." be changed to '3.9'?

Right: I created #18747 to update the doc.

@hugovk hugovk mentioned this pull request Dec 13, 2020
Merged
Anthchirp added a commit to Anthchirp/cpython that referenced this pull request Apr 8, 2021
@Anthchirp
Fix collections ABC deprecation notice
e81f1c3 
The deprecation originally slated for 3.9 was deferred to 3.10
(bpo-39674, pythonGH-18545) and the documentation on the 3.8 release was
updated accordingly (pythonGH-18748). However the deprecation notice in
the code was left as is, and still indicates deprecation with 3.9.
Anthchirp added a commit to Anthchirp/cpython that referenced this pull request Apr 8, 2021
@Anthchirp
Fix collections ABC deprecation notice
4cb7348 
The deprecation originally slated for 3.9 was deferred to 3.10
(bpo-39674, pythonGH-18545). However the deprecation notice in the release
was left as is, and still indicates deprecation with 3.9.

Also add a missing space in the message.
This was referenced Apr 8, 2021
Closed
Merged
vstinner pushed a commit that referenced this pull request Apr 8, 2021
@Anthchirp
bpo-39674: Fix collections ABC deprecation notice (GH-25281)
20d56bd 
The deprecation originally slated for 3.9 was deferred to 3.10
(bpo-39674, GH-18545) and the documentation on the 3.8 release was
updated accordingly (GH-18748). However the deprecation notice in
the code was left as is, and still indicates deprecation with 3.9.
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@gvanrossum gvanrossum gvanrossum approved these changes

@serhiy-storchaka serhiy-storchaka serhiy-storchaka approved these changes

@rhettinger rhettinger Awaiting requested review from rhettinger

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