Correct Glossary key function example to use str.casefold instead of str.lower #140316
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…str.lower The glossary currently states: “the str.lower() method can serve as a key function for case-insensitive sorts.” I believe this should be updated to use str.casefold() instead. str.casefold() is recommended for case-insensitive matching in Unicode, and it provides more accurate behavior across languages than str.lower(). This also aligns with the "Sorting Techniques" section of the docs, which uses str.casefold() as the key function for case-insensitive sorting.
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StanFromIreland
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Oct 19, 2025
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The glossary currently states:
“the
str.lower()method can serve as a key function for case-insensitive sorts.”I believe this should be updated to use
str.casefold()instead.str.casefold()is recommended for case-insensitive matching in Unicode, and it provides more accurate behavior across languages thanstr.lower(). This also aligns with the "Sorting Techniques" section of the docs, which usesstr.casefold()as the key function for case-insensitive sorting.📚 Documentation preview 📚: https://cpython-previews--140316.org.readthedocs.build/