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Drops support for 3.9, adds support for 3.13 #1411

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Drops support for 3.9, adds support for 3.13 #1411

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@elijahbenizzy
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@elijahbenizzy elijahbenizzy commented Oct 19, 2025 •
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3.9 is EOL in october

Changes

  • adds 3.13
  • drops 3.8/3.9 provisions, tests, etc...

How I tested this

  • unit tests + CI

Notes

Checklist

  • PR has an informative and human-readable title (this will be pulled into the release notes)
  • Changes are limited to a single goal (no scope creep)
  • Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
  • Any change in functionality is tested
  • New functions are documented (with a description, list of inputs, and expected output)
  • Placeholder code is flagged / future TODOs are captured in comments
  • Project documentation has been updated if adding/changing functionality.

@cswartzvi
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cswartzvi commented Oct 19, 2025

@elijahbenizzy I am very excited for this! What do you think about including freethreaded python in the actions matrix (3.13t)? Maybe we are not ready to go on record as supporting free threading, but it might be nice to keep an eye on it. What do you think?

@ShoaibG1
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ShoaibG1 commented Oct 20, 2025 •
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@elijahbenizzy I am still using AWS Glue Python Shell jobs which are still on Python 3.9. I hope AWS does something soon. I trust the current version of Hamilton will work fine with Python 3.9? I guess I won't get future enhancements and patches until I upgrade.

zilto
zilto approved these changes Oct 20, 2025
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Looks good to me!

For future work, Python 3.10 allows us to use | in typing.

examples/hello_world/my_dag.png
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@zilto zilto Oct 20, 2025

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remove file from PR? I believe it's a test artifact

examples/styling_visualization/dag.png
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@zilto zilto Oct 20, 2025

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remove from PR? It's the same graph but with a different random layout

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@zilto zilto zilto approved these changes

@skrawcz skrawcz Awaiting requested review from skrawcz

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4 participants

@elijahbenizzy @cswartzvi @ShoaibG1 @zilto