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GeezerVison is showing github.com — gh-91349: Update `gzip` docs and docstrings for the default compresslevel of 6 by s-t-e-v-e-n-k · Pull Request #159439 · python/cpython

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@s-t-e-v-e-n-k

@s-t-e-v-e-n-k s-t-e-v-e-n-k commented Oct 15, 2026 •
edited by bedevere-app Bot
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Python 3.15 dropped the default compress level to 6, but 2 docstring still state the default level is 9.

This will require a backport to 3.15, but no earlier.

  • Issue: Use zlib-ng (fast!) rather than mainline stale zlib in binary releases #91349

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@s-t-e-v-e-n-k
Correct docstrings about compress level change
cffee31 
Python 3.15 dropped the default compress level to 6, but 2 docstring
still state the default level is 9.
@bedevere-app bedevere-app Bot added the awaiting review label Oct 15, 2026
@StanFromIreland StanFromIreland changed the title Trivial: correct docstrings about compress level change gh-91349: Correct docstrings about compress level change Oct 21, 2026
@bedevere-app bedevere-app Bot added the type-feature A feature request or enhancement label Oct 21, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Oct 21, 2026
Use zlib-ng (fast!) rather than mainline stale zlib in binary releases #91349
Closed
@StanFromIreland StanFromIreland changed the title gh-91349: Correct docstrings about compress level change gh-91349: Update gzip docs and docstrings for the default compresslevel of 6 Oct 21, 2026
@StanFromIreland
Also fix GZipFile doc
9fd9a36
StanFromIreland
StanFromIreland approved these changes Oct 21, 2026
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@StanFromIreland StanFromIreland left a comment

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I pushed an additional fix, I hope that's alright.

LGTM!

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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting review labels Oct 21, 2026
@StanFromIreland StanFromIreland added the skip news label Oct 21, 2026
@StanFromIreland
StanFromIreland enabled auto-merge (squash) October 21, 2026 18:11
@StanFromIreland StanFromIreland added the needs backport to 3.15 bugs and security fixes label Oct 21, 2026
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read-the-docs-community Bot commented Oct 21, 2026

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Documentation build overview

📚 cpython-previews | 🛠️ Build #35305883 | 📁 Comparing 9fd9a36 against main (796b26b)

  🔍 Preview build  

25 files changed · + 1 added · ± 24 modified

+ Added

  • c-api/pyexpat.html

± Modified

  • c-api/code.html
  • c-api/conversion.html
  • c-api/dict.html
  • c-api/exceptions.html
  • c-api/file.html
  • c-api/function.html
  • c-api/hash.html
  • c-api/import.html
  • c-api/intro.html
  • c-api/long.html
  • and 14 more...
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@StanFromIreland
StanFromIreland merged commit 49aed47 into python:main Oct 21, 2026
60 of 61 checks passed

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@bedevere-app bedevere-app Bot removed the awaiting merge label Oct 21, 2026
@miss-islington-app

miss-islington-app Bot commented Oct 21, 2026

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Thanks @s-t-e-v-e-n-k for the PR, and @StanFromIreland for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖
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@bedevere-app

bedevere-app Bot commented Oct 21, 2026

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GH-160096 is a backport of this pull request to the 3.15 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Oct 21, 2026
@StanFromIreland

StanFromIreland commented Oct 21, 2026

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Merged, thanks!
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StanFromIreland added a commit that referenced this pull request Oct 22, 2026
@miss-islington @s-t-e-v-e-n-k @StanFromIreland
[3.15] gh-91349: Update gzip docs and docstrings for the default co…
ef37746 
…mpresslevel of 6 (GH-159439) (#160096)

(cherry picked from commit 49aed47)

Co-authored-by: Steve Kowalik <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>
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@StanFromIreland StanFromIreland StanFromIreland approved these changes

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@s-t-e-v-e-n-k @StanFromIreland
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