💭 Deprecations via warnings don’t work for Python libraries
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!https://simonwillison.net/2025/Dec/9/deprecations-via-warnings/#atom-everything

Date: December 9, 2025

Deprecations via warnings don’t work for Python libraries
 Seth Larson reports that urllib3 2.6.0 released on the 5th of December and finally removed the HTTPResponse.getheaders() and HTTPResponse.getheader(name, default) methods, which have been marked as...
 Simon Willison’s Weblog · simonwillison.net [1]

Deprecation warnings are so easy to miss, ignore, become numb to. Creating tools and processes to catch and address these issues is important. I'm surprised such big projects let deprecations just hang around for years.

!!! note

 This post is a thought [2]. It's a short note that I make
 about someone else's content online #thoughts [3]

References:
[1]: https://simonwillison.net/2025/Dec/9/deprecations-via-warnings/#atom-everything
[2]: /thoughts/
[3]: /tags/thoughts/