#460 Overlooked Python Typing

Python Bytes

Topics covered in this episode:

• Advent of Code starts today
• Django 6 is coming
• Advanced, Overlooked Python Typing
• codespell
• Extras
• Joke

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Brian #1: Advent of Code starts today

• A few changes, like 12 days this year, which honestly, I’m grateful for.

Michael #2: Django 6 is coming

• Expected December 2025
• Django 6.0 supports Python 3.12, 3.13, and 3.14
• Built-in support for the Content Security Policy (CSP) standard is now available, making it easier to protect web applications against content injection attacks such as cross-site scripting (XSS).
• The Django Template Language now supports template partials, making it easier to encapsulate and reuse small named fragments within a template file.
• Django now includes a built-in Tasks framework for running code outside the HTTP request–response cycle. This enables offloading work, such as sending emails or processing data, to background workers.
• Email handling in Django now uses Python’s modern email API, introduced in Python 3.6. This API, centered around the email.message.EmailMessage class

Brian #3: Advanced, Overlooked Python Typing

• get_args, TypeGuard, TypeIs, and more goodies

Michael #4: codespell

• Learned from this PR for the Talk Python book.
• Fix common misspellings in text files.
• It's designed primarily for checking misspelled words in source code (backslash escapes are skipped), but it can be used with other files as well.
• It does not check for word membership in a complete dictionary, but instead looks for a set of common misspellings. Therefore it should catch errors like "adn", but it will not catch "adnasdfasdf".
• It shouldn't generate false-positives when you use a niche term it doesn't know about.

Extras

Michael:

• Follow up on tach from Gerben Dekker:
  • tach has been unmaintained for a bit but is not anymore. It was the main product from Gauge which is a Y combinator startup that pivoted to something unrelated and abandoned tach. However, https://github.com/DetachHead forked it but now got access to the main repo and has committed to maintaining it.
  • ruff analyze graph is fully independent of tach - we actually started to look into alternatives for tach when it became unmaintained and then found ruff analyze graph.
  • For our use case, with just a bit of manipulation on top of ruff analyze graph we replaced our use of deptry (which was slower - and I try to be careful depending on one-man projects).
• A Review of Michael Kennedy’s book, “Talk Python in Production” - Thanks Doug

Joke: NoaaS