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

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rhettinger merged 9 commits intopython:mainfromrhettinger:tee1
Sep 25, 2024

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@rhettingerrhettinger commentedSep 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/

@rhettingerrhettinger added type-bugAn unexpected behavior, bug, or error needs backport to 3.12only security fixes needs backport to 3.13bugs and security fixes labelsSep 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).

@rhettingerrhettinger merged commit909c6f7 intopython:mainSep 25, 2024
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@miss-islington-app
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Thanks@rhettinger for the PR 🌮🎉.. I'm working now to backport this PR to: 3.12, 3.13.
🐍🍒⛏🤖

@miss-islington-app
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Sorry,@rhettinger, I could not cleanly backport this to3.13 due to a conflict.
Please backport usingcherry_picker on command line.

cherry_picker 909c6f718913e713c990d69e6d8a74c05f81e2c2 3.13

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Sorry,@rhettinger, I could not cleanly backport this to3.12 due to a conflict.
Please backport usingcherry_picker on command line.

cherry_picker 909c6f718913e713c990d69e6d8a74c05f81e2c2 3.12

emilyemorehouse added a commit to lysnikolaou/cpython that referenced this pull requestSep 26, 2024
* main: (69 commits)  Add "annotate" SET_FUNCTION_ATTRIBUTE bit to dis. (python#124566)pythongh-124412: Add helpers for converting annotations to source format (python#124551)pythongh-119180: Disallow instantiation of ConstEvaluator objects (python#124561)  For-else deserves its own section in the tutorial (python#123946)  Add 3.13 as a version option to the crash issue template (python#124560)pythongh-123242: Note that type.__annotations__ may not exist (python#124557)pythongh-119180: Make FORWARDREF format look at __annotations__ first (python#124479)pythonGH-58058: Add quick reference for `ArgumentParser` to argparse docs (pythongh-124227)pythongh-41431: Add `datetime.time.strptime()` and `datetime.date.strptime()` (python#120752)pythongh-102450: Add ISO-8601 alternative for midnight to `fromisoformat()` calls. (python#105856)pythongh-124370: Add "howto" for free-threaded Python (python#124371)pythongh-121277: Allow `.. versionadded:: next` in docs (pythonGH-121278)pythongh-119400:  make_ssl_certs: update reference test data automatically, pass in expiration dates as parameterspython#119400  (pythonGH-119401)pythongh-119180: Avoid going through AST and eval() when possible in annotationlib (python#124337)pythongh-124448: Update Windows builds to use Tcl/Tk 8.6.15 (pythonGH-124449)pythongh-123884 Tee of tee was not producing n independent iterators (pythongh-124490)pythongh-124378: Update test_ttk for Tcl/Tk 8.6.15 (pythonGH-124542)pythongh-124513: Check args in framelocalsproxy_new() (python#124515)pythongh-101100: Add a table of class attributes to the "Custom classes" section of the data model docs (python#124480)  Doc: Use ``major.minor`` for documentation distribution archive filenames (python#124489)  ...
@picnixzpicnixz removed needs backport to 3.12only security fixes needs backport to 3.13bugs and security fixes labelsApr 5, 2025
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