Support Python 3.11

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
python

Research direction

Start in smithy-lang/smithy-python and inspect the Smithy runtime, code-generator metadata, and existing CI and test coverage. Run the unit, protocol, transport, and streaming tests with Python 3.11, including aiohttp and AWS CRT paths; done means generated clients install and import, packages and documentation declare support, and the CI coverage passes.

Written by the indexing model from the issue text.

Description

Request

The AWS SDK for Python currently requires Python 3.12 or newer. This issue tracks adding support for Python 3.11, which remains supported upstream until October 2027. It follows the version-support discussion in #8. Python 3.10 is outside this issue's scope.

Our initial review indicates that Python 3.11 support is feasible, but we have not committed to a release or timeline. If this affects you, please add a thumbs-up reaction. Comments describing blocked use cases or deployment environments will help us understand the impact.

Required Changes

Generated service-client code already appears compatible with Python 3.11. Most changes are needed in the Smithy runtime:

  • Replace Python 3.12-only PEP 695 syntax with TypeAlias, TypeVar, and Generic
  • Use typing_extensions.override on Python 3.11
  • Update runtime and code-generator metadata
  • Add Python 3.11 CI and test coverage
  • Regenerate affected clients
  • Test aiohttp, AWS CRT, and streaming operations
  • Update SDK documentation and classifiers

The third-party transport and JSON parser dependencies we reviewed already support Python 3.11.

Most implementation work will take place in smithy-lang/smithy-python. This issue will track the SDK release and provide a place to follow progress.

Completion Criteria

  • Generated clients install and import on Python 3.11
  • Unit, protocol, transport, and streaming tests pass
  • Published packages declare Python 3.11 support
  • Documentation and CI include Python 3.11
Dominant language
Python
Stars
171
Forks
24
Avg merge
10h 47m
Merged PRs (30d)
7

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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