Henry S. Thompson <h...@inf.ed.ac.uk> added the comment:
This issue is also implicated in a failure of isalpha and friends.
Easy way to see this is to compare
>>> isalpha('İ')
True
>>> isalpha('İ'.lower())
False
This results from the use of a combining character to encode lower-case Turkish
dotted i:
>>> len('İ'.lower())
2
>>> unicodedata.category('İ'.lower()[1])
'Mn'
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nosy: +HThompson
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue12731>
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