fix: accept raw UUID strings as --namespace argument in uuid CLI (gh-148740) by Jah-yee · Pull Request #148936 · python/cpython

Jah-yee · 2026-04-23T21:10:05Z

Good day

The uuid CLI module (python -m uuid) did not accept raw UUID strings as the --namespace argument for uuid5/uuid3 commands, even though the Python API uuid.uuid5(uuid.UUID(...), name) does.

Issue: Fix UUID's CLI for custom namespaces for v3/v5 #148740

Change

Adds a custom _namespace_type argparse type that accepts either a predefined namespace name (@dns, @url, @oid, @x500) or a raw UUID string
Example now works: python -m uuid --uuid uuid5 --namespace 0d6a16cc-34a7-47d8-b660-214d0ae184d2 --name some.user

Before

python -m uuid --uuid uuid5 --namespace 0d6a16cc-34a7-47d8-b660-214d0ae184d2 --name some.user
# error: invalid choice (must be a predefined name)

After

python -m uuid --uuid uuid5 --namespace 0d6a16cc-34a7-47d8-b660-214d0ae184d2 --name some.user
a32f4562-2058-5b20-8055-5f38b28285b6

Thank you for your work on this project. I hope this small fix is helpful. Please let me know if there's anything to adjust.

Warmly,
RoomWithRoof

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fix: accept raw UUID strings as --namespace argument in uuid CLI

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fix: accept raw UUID strings as --namespace argument in uuid CLI (gh-148740)#148936

fix: accept raw UUID strings as --namespace argument in uuid CLI (gh-148740)#148936
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