gh-133986: Document string split algorithm when sep is None and maxsplit is 0 #133987
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donBarbos
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May 14, 2025
Co-authored-by: Semyon Moroz <donbarbos@proton.me>
nedbat
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needs backport to 3.13
miss-islington
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May 14, 2025
… maxsplit is 0 (pythonGH-133987) * Document string split algorithm when sep is None and maxsplit is 0 * Update Doc/library/stdtypes.rst Co-authored-by: Semyon Moroz <donbarbos@proton.me> --------- (cherry picked from commit 3e23047) Co-authored-by: Joey Smith <joeysmith@gmail.com> Co-authored-by: Ned Batchelder <ned@nedbatchelder.com> Co-authored-by: Semyon Moroz <donbarbos@proton.me>
miss-islington
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May 14, 2025
… maxsplit is 0 (pythonGH-133987) * Document string split algorithm when sep is None and maxsplit is 0 * Update Doc/library/stdtypes.rst Co-authored-by: Semyon Moroz <donbarbos@proton.me> --------- (cherry picked from commit 3e23047) Co-authored-by: Joey Smith <joeysmith@gmail.com> Co-authored-by: Ned Batchelder <ned@nedbatchelder.com> Co-authored-by: Semyon Moroz <donbarbos@proton.me>
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GH-133992 is a backport of this pull request to the 3.13 branch. |
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GH-133993 is a backport of this pull request to the 3.14 branch. |
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I'm a bit late I suppose, but I don't think this is specific to >>> " foo bar ".split(maxsplit=1)
['foo', 'bar '] |
terryjreedy
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May 15, 2025
…d maxsplit is 0 (GH-133987) (#133992) gh-133986: Document string split algorithm when sep is None and maxsplit is 0 (GH-133987) --------- (cherry picked from commit 3e23047) Co-authored-by: Joey Smith <joeysmith@gmail.com> Co-authored-by: Ned Batchelder <ned@nedbatchelder.com> Co-authored-by: Semyon Moroz <donbarbos@proton.me>
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If sep is not specified or is None and maxsplit is 0, only leading runs of consecutive whitespace are considered. This is contrary to (or, at least, underspecified in) the current documentation.
I have documented the observed behaviour, and added some example code.
📚 Documentation preview 📚: https://cpython-previews--133987.org.readthedocs.build/