[Python-ideas] adding a casefold() method to str

Benjamin Peterson benjamin at python.org
Sun Jan 8 17:17:30 CET 2012

Casefolding (Unicode Standard 3.13) is a more aggressive version of lowercasing.
It's purpose to assist in the implementation of caseless mapping. For example,
under lowercase "ß" -> "ß" but under casefolding "ß" -> "ss". I propose we add a
casefold() method. So, case-insensitive matching should really be
"one.casefold() == two.casefold()"
rather than "one.lower() == two.lower()".


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