Deprecate lib2to3 (and 2to3) for future removal

[gpshead]

BPO	40360
Nosy	@gvanrossum, @gpshead, @vstinner, @carljm, @ambv, @ericsnowcurrently, @hroncok, @corona10, @miss-islington, @tirkarthi, @isidentical, @iritkatriel
PRs	python/cpython#19645 python/cpython#19663 python/cpython#19898 python/cpython#21694 python/cpython#21696 python/cpython#21697 python/cpython#28116 python/cpython#28122 python/cpython#28127 python/cpython#29064

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields: ```python assignee = None closed_at = created_at = labels = ['type-feature', 'expert-2to3', '3.11'] title = 'Deprecate lib2to3 (and 2to3) for future removal' updated_at = user = 'https://github.com/gpshead' ``` bugs.python.org fields: ```python activity = actor = 'iritkatriel' assignee = 'none' closed = True closed_date = closer = 'vstinner' components = ['2to3 (2.x to 3.x conversion tool)'] creation = creator = 'gregory.p.smith' dependencies = [] files = [] hgrepos = [] issue_num = 40360 keywords = ['patch'] message_count = 51.0 messages = ['366973', '367005', '367031', '367051', '367208', '367209', '367230', '367235', '367716', '367726', '367730', '367743', '367744', '367766', '367767', '367770', '367771', '367884', '368077', '368388', '373185', '373198', '373327', '373332', '373334', '373444', '373538', '374348', '374349', '374566', '374572', '374573', '374574', '374611', '374634', '374643', '379014', '400876', '400877', '400879', '400883', '400885', '400892', '400905', '400906', '400923', '400927', '400933', '400937', '404324', '404532'] nosy_count = 14.0 nosy_names = ['gvanrossum', 'gregory.p.smith', 'vstinner', 'carljm', 'lukasz.langa', 'eric.snow', 'davidhalter', 'hroncok', 'corona10', 'miss-islington', 'xtreak', 'BTaskaya', 'Peter Ludemann', 'iritkatriel'] pr_nums = ['19645', '19663', '19898', '21694', '21696', '21697', '28116', '28122', '28127', '29064'] priority = 'normal' resolution = 'fixed' stage = 'resolved' status = 'closed' superseder = None type = 'enhancement' url = 'https://bugs.python.org/issue40360' versions = ['Python 3.11'] ```

[iritkatriel]

Created bpo-45544 to close all open issues and list them there.

[johns1c]

What does this mean for someone who picks up a bit of code that happens to be obsolete and then starts getting warnings about print statements and lots of other stuff?

[gvanrossum]

@johns1c -- It means that you should ask for help somewhere else. :-) Seriously, try explaining your problem in our Discourse server at discuss.python.org.

[vstinner]

For people who still have a Python 2 code base: download/install Python 3.12 and run 2to3 included in this version. Or give a try to 2to3 alternatives.

[johns1c]

Thanks for your reply.

This works for Python 3.11 with 2to3.exe being found in the Scripts directory of my Windows 11 64 bit install and 2to3.py being found in Tools\scripts (it was ‘tools\scripts’ in 3.8)

Interestingly the Windows install for Python 3.12 does NOT provide either the library or the runnable utility.

From now on it seems that a user wishing to upgrade old Python 2 code needs to install 2to3 using PIP. The command PIP install 2to3 will install 2to3.exe in the Scripts directory under the Python install directory or in the scripts directory of a virtual environment.

Chris J

From: Victor Stinner Sent: 14 November 2023 12:25 To: python/cpython Cc: C Johnson; Mention Subject: Re: [python/cpython] Deprecate lib2to3 (and 2to3) for future removal(#84540)

For people who still have a Python 2 code base: download/install Python 3.12 and run 2to3 included in this version. Or give a try to 2to3 alternatives. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: @.***>