Python 3.13

[sklam]

This issue is to track tasks and issues with Python 3.13.

Numba support status:

• Started early work on Python3.13.0a3. So far, there is minimal bytecode changes (WIP branch: main...sklam:numba:wip/py3.13). We got numba/tests/test_usecases.py to pass. However, more involved tests are blocked by an issue with metaclass (Python 3.13.0a3 metaclass __call__ runs only once  python/cpython#114806). As a result, Type._code is not set properly. (temporary debug commit related to the issue: 4b6cc78)
• Added development setup using hatchery: Python 3.13 numba-hatchery#8
• Work is halted until 3.13.0a4 is available. Expected on Feb 13 2024.
• Work resumes using 3.13.0a6 as Python 3.13.0a3 metaclass __call__ runs only once  python/cpython#114806 is resolved. Continues to look into try-except changes 7/33 failures in test_try_except.py

[aaronzo]

Great to see some steps towards 3.13 taking place - will numba publish PEP 703 free threading wheels (-cp313t)?

[sklam]

RE: #9413 (comment)

will numba publish PEP 703 free threading wheels (-cp313t)?

We are talking about providing freethreading packages but the current priority is just to get through all the issues with bytecode changes.

As of a8ad12a, the testsuite is at 493 failures out of 10385.

[sklam]

As of 6cafffe, everything is working on py3.13 except for 3 failures that are unrelated to py3.13:

• numba.tests.test_lists.TestLists.test_mul_error
  • Python3.13 is not raising MemoryError in the hatchery docker.
  • rosetta error: could not find free space for allocation size 1000000000001000
• numba.tests.test_nrt.TestNrtMemInfo.test_allocate_invalid_size
  • rosetta error: could not find free space for allocation size 2000000000001000
• numba.tests.test_function_type.TestFunctionTypeExtensions.test_wrapper_address_protocol_libm
  • Fail when running alone. Works when with other tests. Probably due to
    initialization problem.

[jmerkel11]

Basically the same as aaronzo said, but for PEP 738.
At first thanks for your awesome work, then the question: Will you support numba on Android starting with Python 3.13?
Otherwise, current Android support will likely die ( chaquo/chaquopy#834 ).

[mhsmith]

Hi, I'm the maintainer of Chaquopy. Both myself and the Numba maintainers now work for Anaconda, so we'll hopefully be able to produce Numba builds for Python 3.13 on Android later in the year. But first we'll need to deal with more fundamental packages like NumPy.

[jakirkham]

Think we need llvmlite supported on Python 3.13. Is that being tracked in an issue somewhere as well?

[stuartarchibald]

@jakirkham thanks for the reminder, there is now numba/llvmlite#1084