[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[Eric Snow]

Eric Snow  added the comment:

FTR, Antoine originally removed in b43c4caf81b10e5c7ebaeb3a712c6db584f60bbd and 
added back (but deprecated) a few days later in 
b43c4caf81b10e5c7ebaeb3a712c6db584f60bbd. [1]  That happened in September 2017 
for Python 3.7.


[1] https://bugs.python.org/issue31370#msg302476

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nosy: +eric.snow, pitrou

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[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[STINNER Victor]

STINNER Victor  added the comment:

Bye bye dummy_threading. As explained in PR 14143, I kept a reference to 
dummy_threading in 2to3 on purpose. Keep it there is fine, it helps to port 
legacy Python 2 code to Python 3.

--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 8bf08ee45b7c2341f0d0175b91892843a37c23da by Victor Stinner in 
branch 'master':
bpo-37312: Remove _dummy_thread and dummy_threading modules (GH-14143)
https://github.com/python/cpython/commit/8bf08ee45b7c2341f0d0175b91892843a37c23da


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[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[STINNER Victor]

STINNER Victor  added the comment:

Python 3.7 has been modified to always require threading support:

* https://bugs.python.org/issue31370
* https://mail.python.org/pipermail/python-dev/2017-September/149156.html

commit a6a4dc816d68df04a7d592e0b6af8c7ecc4d4344
Author: Antoine Pitrou 
Date:   Thu Sep 7 18:56:24 2017 +0200
 
bpo-31370: Remove support for threads-less builds (#3385)
   
* Remove Setup.config
* Always define WITH_THREAD for compatibility.

--

In Python 3.8, the dummy_threading module is documented as:

"This module provides a duplicate interface to the threading module. It was 
meant to be imported when the _thread module was not provided on a platform.

Be careful to not use this module where deadlock might occur from a thread 
being created that blocks waiting for another thread to be created. This often 
occurs with blocking I/O."

https://docs.python.org/dev/library/dummy_threading.html

And the doc starts with: "Deprecated since version 3.7: Python now always has 
threading enabled. Please use threading instead."

IMHO it's now time to remove this module.

--

I proposed to remove these modules today after I saw a bug on _dummy_thread: 
bpo-36688.

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[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[STINNER Victor]

Change by STINNER Victor :


--
keywords: +patch
pull_requests: +13984
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/14143

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[issue37312] Remove deprecated _dummy_thread and dummy_threading modules

[STINNER Victor]

New submission from STINNER Victor :

The _dummy_thread and dummy_threading modules are deprecated since Python 3.7 
which now requires threading support. Attached PR removes these modules.

--
components: Library (Lib)
messages: 345810
nosy: vstinner
priority: normal
severity: normal
status: open
title: Remove deprecated _dummy_thread and dummy_threading modules
versions: Python 3.9

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