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Difference between casefold() and lower() in Python
schedule Aug 11, 2023
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str.casefold() is suited for caseless matching for unicode characters while str.lower() is suited for caseless matching of ASCII characters.
Example
The German lowercase letter ß has a caseless equivalent of ss. Since ß is already lowercase, str.lower() method does not perform any transformation, however, str.casefold() converts it to caseless form ss:
print('der Fuß'.lower())print('der Fuß '.casefold())
der fußder fuss
Related
Python String | casefold method
Python's str.casefold() method converts all characters of a provided string to lowercase.
Python String | lower method
Python's str.lower() method converts all cased characters of a provided string to lowercase.
Published by Isshin Inada
Edited by 0 others
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