STINNER Victor <vstin...@python.org> added the comment:
Oh, LegacyInterpolation is not documented at:
https://docs.python.org/dev/library/configparser.html
> Other configparser deprecations were added in 3.2, but with
> DeprecationWarnings.
Its deprecation was never documented anywhere in Doc/.
Well, to respect the PEP 387, the class should emit a DeprecationWarning and
its depreaction must be documented in What's New in Python 3.11.
> The LegacyInterpolation class of configparser has been deprecated in docs
> since 3.2, but without raising a DeprecationWarning.
I found the following change:
---
commit 7f64c8a5121576fd8f92010b7a936b89581c4051
Author: Łukasz Langa <luk...@langa.pl>
Date: Thu Dec 16 01:16:22 2010 +0000
Broken ConfigParser removed, SafeConfigParser renamed to ConfigParser.
Life is beatiful once again.
---
It renamed BrokenInterpolation to LegacyInterpolation:
-class BrokenInterpolation(Interpolation):
- """Deprecated interpolation as implemented in the classic ConfigParser.
+class LegacyInterpolation(Interpolation):
+ """Deprecated interpolation used in old versions of ConfigParser.
The BrokenInterpolation class was added by bpo-10499:
---
commit b6a6f5f886ed869612e16cd1e29a1190996dc78d
Author: Łukasz Langa <luk...@langa.pl>
Date: Fri Dec 3 16:28:00 2010 +0000
Issue 10499: Modular interpolation in configparser
---
It would be nice to have Łukasz's opinion on deprecating LegacyInterpolation.
The configparser.RawConfigParser has an "interpolation" parameter and
configparser.RawConfigParser._DEFAULT_INTERPOLATION is an instance of
configparser.Interpolation:
---
# Interpolation algorithm to be used if the user does not specify another
_DEFAULT_INTERPOLATION = Interpolation()
---
If the BrokenInterpolation is removed in Python 3.13 and a project is affected
by the removal, can it simply copy/paste the Python 3.12 copy in its project
and continue using the class? configparser.Interpolation seems to be a clean
ABC class, so it seems safe to copy/paste the code. It doesn't seem to depend
on anything but configparser.Interpolation which is public (even if it's not
documented).
https://bugs.python.org/issue45173#msg409685:
> Searching 4,764 sdists from the top 5,000 PyPI packages, these 13 contain
> "LegacyInterpolation": (...)
> two are stdlib backports: (...)
> The others are all configparser.pyi typeshed stub files: (...)
I understand that *in practice*, removing the class would impact no project of
the top 5000 PyPI projects. Thanks for checking!
----------
nosy: +lukasz.langa, vstinner
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