About the show

Sponsored by Influxdb

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 Tuesdays at 11am PT. Older video versions available there too.

Brian #1: Pydantic V2 Pre Release

• Terrence Dorsey & Samuel Colvin
• Alpha release available to everyone: pip install --pre -U "pydantic>=2.0a1"
• Headlines:
  • pydantic-core - all validation logic rewritten in Rust and moved to separate package, pytest-core
    • 5-50x faster
    • separation will aid safety and maintainability
• Lots ready for experimentation
  • BaseModel, Dataclasses, Serialization, …
• Much still under construction
  • Docs, BaseSettings→ pydantic-settings, …

Michael #2: microdot The impossibly small web framework for Python and MicroPython

• Microdot is a minimalistic Python web framework inspired by Flask, and designed to run on systems with limited resources such as microcontrollers.
• It runs on standard Python and on MicroPython.
• Support for async, websockets, tls, even ASGI servers.
• python-static.nyc3.digitaloceanspaces.com/flask-vs-microdot-mem.png">Less mem usage by a big margin.

Brian #3: GitHub Actions Tools: watchgha, build and inspect, and pytest annotate failures

• watchgha
  • Ned Batchelder
  • Watch GH Actions progress on the command line
• build-and-inspect-python-package
  • Hynek
  • Test the build of wheels, check contents, lint README
  • print sdist contents, wheel contents, and metadata
• pytest-github-actions-annotate-failures
  • utgwkk
  • Nice traceback annotations for pytest

Michael #4: PEP 709 – Inlined comprehensions

• by Carl Meyer
• Comprehensions are currently compiled as nested functions, which provides isolation of the comprehension’s iteration variable, but is inefficient at runtime.
• This PEP proposes to inline list, dictionary, and set comprehensions into the code where they are defined, and provide the expected isolation by pushing/popping clashing locals on the stack.
• This change makes comprehensions much faster: up to 2x faster for a microbenchmark of a comprehension alone.

Extras

Michael:

• Python Web Apps that Fly with CDNs Course

Joke: Can’t watch movies