Python 3.x is this the fastest way to compare strings? case insensitive string comparison

Asked 8 years ago

Active 8 years ago

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Is there some module out there that has fast case insensitive string comparisons for Python 3.x or is this the fastest way to compare A LOT of strings?

def compare(s1,s2):
    if s1.upper() == s2.upper():
        return True
    return False

print (compare("59gndif_^ngJJDS","59gndif_^ngJJDS"))
print (compare("59gndifngJJDS","insdffn"))

True
False

edited Jun 27 '17 at 13:55

Jean-François Fabre

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asked Jun 27 '17 at 13:30

ragardner

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in order to have cleaner code, you could just return 's1.upper() == s2.upper()' – HH1 Jun 27 '17 at 13:32
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Note that comparing `.upper()` actually is not always correct. There are special characters in some languages that have no uppercase, like the *est-zet* in German. – Willem Van Onsem Jun 27 '17 at 13:33
@WillemVanOnsem would .lower() work in those situations? – ragardner Jun 27 '17 at 13:35
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surprisingly I couldn't (easily) find an original question to make that one a duplicate, so +1 :) – Jean-François Fabre Jun 27 '17 at 13:36
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@new_to_coding: I seriously doubt that. Some see the est-zet as a typography trick (which is almost certainly its orginin). Usually in german the upper-case variant of *est-zet* is `'SS'` or `'SZ'`, so making that `lower()` again will result in `'sz'`... – Willem Van Onsem Jun 27 '17 at 13:36
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@Jean-FrançoisFabre: perhaps [this is a duplicate](https://stackoverflow.com/a/40551443/67579). – Willem Van Onsem Jun 27 '17 at 13:53
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@WillemVanOnsem clearly it is!! I've edited to add the "python" tag so you can close that! – Jean-François Fabre Jun 27 '17 at 13:55
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@WillemVanOnsem that's it! work as a team :) note that the old question can still be answered if someone figures out the fastest way to compare strings. – Jean-François Fabre Jun 27 '17 at 14:03

Python 3.x is this the fastest way to compare strings? case insensitive string comparison

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