Drop Python 3.9 support in http-client-python (min Python 3.10)#10500
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Drop Python 3.9 support in http-client-python (min Python 3.10)#10500
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[WIP] Update minimum Python version to 3.10
Drop Python 3.9 support in http-client-python (min Python 3.10)
Apr 27, 2026
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Python 3.9 reached end-of-life, so the
@typespec/http-client-pythonemitter and its generated SDKs now require Python 3.10+.Generator
MIN_PYTHON_VERSIONto3.10ingeneral_serializer.py— propagates to generatedsetup.py,pyproject.toml, andREADME.mdvia the packaging Jinja templates.Programming Language :: Python :: 3.9classifier fromgenerator/setup.py.README.md.jinja2wording to "Python 3.10+".Setup / install scripts
install.py,install.ts,run-python3.ts(emitter + eng copies),prepare.py, andbuild_pygen_wheel.pyfrom>=3.9to>=3.10, with matching message/comment updates.Lint / typecheck configs
pylintrc,pyrightconfig.json,mypy.ini,lint.ts, andrun_pylint.py.Changelog
breakingchronus entry for@typespec/http-client-python.Out of scope
Pipeline YAML already runs on 3.11/3.12. Pre-existing
(3, 9)references inimports.pyandsystem-requirements.tsare illustrative comments, not version checks, and were left alone. The deadsys.version_info < (3, 9, 0)branch invenvtools.pyand the>= (3, 9)test fallback intest_model_base_serialization.pyare similarly harmless and untouched to keep the diff minimal — happy to clean up if reviewers prefer.