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gh-123884 Tee of tee was not producing n independent iterators #124490

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Merged
rhettinger merged 9 commits into from
Sep 25, 2024
Merged

gh-123884 Tee of tee was not producing n independent iterators #124490

rhettinger merged 9 commits into from
Sep 25, 2024

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@rhettinger
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@rhettinger rhettinger commented Sep 25, 2024 •
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  • Eliminates the code path that reused a tee object input as part of the output.
  • Updated the rough equivalent recipe to have better fidelity to the actual C code.
  • Removed a note about using the tee input. It is generically true of all iterator pass throughs and the note made it seem like a caution specific to tee where a tee-of-a-tee is the exception to the rule.

📚 Documentation preview 📚: https://cpython-previews--124490.org.readthedocs.build/

@rhettinger rhettinger added type-bug An unexpected behavior, bug, or error needs backport to 3.12 only security fixes needs backport to 3.13 bugs and security fixes labels Sep 25, 2024
@bedevere-app bedevere-app bot mentioned this pull request Sep 25, 2024
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ericvsmith
ericvsmith approved these changes Sep 25, 2024
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Other than the one noted nit, this all looks good to me. I verified the "roughly equivalent" code, but not the code in test_itertools.py (I figure the test suite will do that job).

@rhettinger rhettinger merged commit 909c6f7 into python:main Sep 25, 2024
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miss-islington-app bot commented Sep 25, 2024

Thanks @rhettinger for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12, 3.13.
🐍🍒⛏🤖

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miss-islington-app bot commented Sep 25, 2024

Sorry, @rhettinger, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 909c6f718913e713c990d69e6d8a74c05f81e2c2 3.13

@rhettinger rhettinger deleted the tee1 branch September 25, 2024 20:38
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miss-islington-app bot commented Sep 25, 2024

Sorry, @rhettinger, I could not cleanly backport this to 3.12 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 909c6f718913e713c990d69e6d8a74c05f81e2c2 3.12

emilyemorehouse added a commit to lysnikolaou/cpython that referenced this pull request Sep 26, 2024