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#35844 assigned New feature

Python 3.14 compatibility.

Reported by:	Mariusz Felisiak	Owned by:	Mariusz Felisiak
Component:	Core (Other)	Version:	dev
Severity:	Normal	Keywords:
Cc:		Triage Stage:	Accepted
Has patch:	no	Needs documentation:	no
Needs tests:	no	Patch needs improvement:	no
Easy pickings:	no	UI/UX:	no

Description

Python 3.14 final is scheduled for October 2025 (see PEP 745). This is a tracking ticket for compatibility fixes for Django submitted in the meantime.

Django 5.2 will be the first version to support Python 3.14, because Django 5.1 will end the mainstream support in April 2024.

Change History (13)

comment:1 by Claude Paroz, 5 weeks ago

Triage Stage:	Unreviewed → Accepted
Version:	5.0 → dev

comment:2 by Mariusz Felisiak, 5 weeks ago

Initial PRs:

https://github.com/django/django/pull/18686 - Added Python 3.14 to daily builds.
https://github.com/django/django/pull/18680 - Fixed asyncio.iscoroutinefunction() deprecation warnings.
https://github.com/django/django/pull/18685 - Fixed tests for test --parallel option.

After applying these 3 changes we'll have one more deprecation warning, 49 test failures, and 24 test errors. All of them are under investigation of Team Venus of the 3rd Djangonauts cohort, PRs will be submitted soonish :)

comment:3 by GitHub <noreply@…>, 5 weeks ago

In 48fa531:

Refs #35844 -- Added Python 3.14 to daily builds.

comment:4 by GitHub <noreply@…>, 5 weeks ago

In bd3b1dfa:

Refs #35844 -- Used asgiref.sync.iscoroutinefunction() instead of deprecated asyncio.iscoroutinefunction().

Fixes DeprecationWarning:

'asyncio.iscoroutinefunction' is deprecated and slated for removal in
Python 3.16; use inspect.iscoroutinefunction() instead.

comment:5 by GitHub <noreply@…>, 4 weeks ago

In 34066d6:

Refs #35844 -- Fixed tests for test --parallel option on Python 3.14+.

"forkserver" is the new default on POSIX systems, and Django doesn't
support parallel tests with "forkserver":

https://github.com/python/cpython/commit/b65f2cdfa77d8d12c213aec663ddaaa30d75a4b2

comment:6 by Sarah Boyce <42296566+sarahboyce@…>, 4 weeks ago

In 4c3897b:

Refs #35844 -- Corrected expected error messages in commands tests on Python 3.14+.

Updated CommandTests.test_subparser_invalid_option and CommandDBOptionChoiceTests.test_invalid_choice_db_option to address changes in Python 3.14+ error handling.

follow-up: 12 comment:7 by Mariusz Felisiak, 4 weeks ago

FYI: urljoin() behavior change has been accepted as a regression in Python 3.14, https://github.com/python/cpython/issues/125926.

comment:8 by Claude Paroz <claude@…>, 3 weeks ago

In fc22fdd3:

Refs #35844 -- Expanded compatibility for expected error messages in command tests on Python 3.12 and 3.13.

Updated CommandTests.test_subparser_invalid_option and CommandDBOptionChoiceTests.test_invalid_choice_db_option to use assertRaisesRegex() for compatibility with modified error messages in Python 3.12, 3.13, and 3.14+..