[pengfeiye]

Summary

CI fails on every PR right now, before any code is tested. ubuntu-latest now resolves to ubuntu-26.04, and actions/python-versions has no Python 3.8 build for 26.04 (the 26.04 builds start at 3.10). So actions/setup-python stops with Version 3.8 with arch x64 not found.

This affects every job that sets up Python 3.8:

• Python 3.8 and Pylint and Black (test.yml) fail at "Setup python".
• docs (sdk-reference.yml) fails at the same step.
• Python 3.x is cancelled by the matrix's fail-fast, so no tests run at all.

For an example, see the checks on #493.

Changes

• Pin the pytest, black (Pylint and Black), and docs jobs to ubuntu-24.04, with a comment that explains why.

The last green runs (#488 and #490, on 2026-09-30) used exactly this setup. They ran on ubuntu-24.04, and setup-python@v2 downloaded python-3.8.18-linux-24.04-x64. The change keeps Python 3.8 in CI, which matches requires-python = ">=3.8". It also keeps pylint on the 3.8-compatible release, so the lint job doesn't pick up the newer too-many-positional-arguments check against existing code.

The long-term fix is to drop Python 3.8 (end of life since October 2024) from the support policy and CI. That is a support decision, so it isn't part of this PR.

Testing

• Confirmed the root cause from the failed job logs (runner image ubuntu-26.04) and from the actions/python-versions manifest (3.8.18 exists for 20.04, 22.04, and 24.04, but not for 26.04)
• Both workflow files parse, and every job's runs-on is ubuntu-24.04
• The checks on this PR are the real test

Related

• Unblocks [TT-5545] feat(events): add events.batch() for the Events batch endpoint #493 (TT-5545). After this merges, [TT-5545] feat(events): add events.batch() for the Events batch endpoint #493 needs main merged in so that its checks run with the pinned runners.

License

I confirm that this contribution is made under the terms of the MIT license and that I have the authority necessary to make this contribution on behalf of its copyright owner.