#407: Back to the future, destination 3.14

Topics covered in this episode:

• Python 3.14.0 alpha 1 is now available
• uv supports dependency groups
• dive: A tool for exploring each layer in a docker image
• pytest-metadata
• Extras
• Joke

About the show

Sponsored by us! Support our work through:

• Our courses at Talk Python Training
• The Complete pytest Course & Hello, pytest!
• Patreon Supporters

Connect with the hosts

• Michael: @mkennedy@fosstodon.org
• Brian: @brianokken@fosstodon.org
• Show: @pythonbytes@fosstodon.org

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am PT. Older video versions available there too.

Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Michael #1: Python 3.14.0 alpha 1 is now available

• First of seven planned alpha releases.
• Many new features for Python 3.14 are still being planned and written. Among the new major new features and changes so far:
  • PEP 649: deferred evaluation of annotations
  • Improved error messages

Brian #2: uv supports dependency groups

• we covered dependency groups in episode 406
• as of 0.4.27, uv supports dependency groups
• docs show how to add dependencies with uv add --group
  • also “The --dev, --only-dev, and --no-dev flags are equivalent to --group dev, --only-group dev, and --no-group dev respectively.”
• To install a group, uv pip install --group doesn’t work yet.
  • It’s waiting for PyPA to decide on an interface for pip, and uv pip will use that interface.
• But sync works.

Mi