[New-bugs-announce] [issue40360] Deprecate lib2to3 (and 2to3) for future removal

[Gregory P. Smith]

New submission from Gregory P. Smith <greg at krypto.org>:

Based on the PEP 617 acceptance thread on python-dev, lib2to3 is eventually going to run into trouble parsing modern syntax a few releases from now.

It would be better off maintained outside of the standard library.  It gets used by a lot of things and is generally useful, but would make a lot more sense as a PyPI project than as something only quasi-maintained within the stdlib (it only gained the ability to parse a couple modern syntax features in via bugfix contributions to the stdlib the past month or two...  meaning a lot of versions of it out there cannot)

Black has already forked it.

goal:  PendingDeprecationWarning and documentation as such in 3.9.  Move to DeprecationWarning in 3.10 or 3.11 and remove it by ~3.12.  Subject to our existing deprecation process guidelines.

----------
assignee: gregory.p.smith
messages: 366973
nosy: gregory.p.smith
priority: normal
severity: normal
status: open
title: Deprecate lib2to3 (and 2to3) for future removal
type: enhancement
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40360>
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