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Brian #2: Summary of Major Changes Between Python Versions

Nicholas Hairs
Changes between versions & Tools & utilities to help with switching
Hopefully you’re already at least at 3.8, but come on, 3.11 & 3.12 are so fun!
Useful things
- pyupgrade can automatically upgrade code base
  - (However, I frequently just upgrade and run tests and let my old code be as-is until it bugs me. - Brian)
- black checks pyproject.toml requires-python setting and uses version specific rules.
Versions (way more highlights listed in the article)
- 3.8
  - Assignment expressions := walrus
  - f"{variable=}" now works
- 3.9
  - Typing has built in generics like dict[], so no more from typing import Dict
  - Dict union operator
  - Strings can removeprefix and removesuffix
- 3.10
  - Structural pattern matching match/case
  - Typing: Union using pipe |
  - Dataclasses support slots=True and kw_only=True
- 3.11
  - tomllib included as a standard TOMP parser
  - Exception groups
  - Exception Notes add_note()
  - Typing: A Self type
  - Star unpacking expressions allowed in for statements: for x in *a, *b:
- 3.12
  - f-strings can re-use quotes
  - Typing: better type parameter syntax
  - Typing: @override decorator ensures a method being overridden by a child class actually exists.

Michael #3: How to check Internet Speed via Terminal? speedtest-cli

Brian #4: Blogs: We all should blog more

Extras

Brian:

If upgrading to pytest 8, be aware that running individual tests with parametrization will result in a reverse order.
- It shouldn’t matter. You shouldn’t be depending on test order.
- But it was surprising to me.
- Issue has been logged

Michael: