New submission from Steven D'Aprano <steve+pyt...@pearwood.info>:
str.capitalize appears to uppercase the first character of the string, which is
okay for ASCII but not for non-English letters.
For example, the letter NJ in Croatian appears as Nj at the start of words when
the first character is capitalized:
Njemačka ('Germany'), not NJemačka.
(In ASCII, that's Njemacka not NJemacka.)
https://en.wikipedia.org/wiki/Gaj's_Latin_alphabet#Digraphs
But using any of:
U+01CA LATIN CAPITAL LETTER NJ
U+01CB LATIN CAPITAL LETTER N WITH SMALL LETTER J
U+01CC LATIN SMALL LETTER NJ
we get the wrong result with capitalize:
py> 'NJemačka'.capitalize()
'NJemačka'
py> 'Njemačka'.capitalize()
'NJemačka'
py> 'njemačka'.capitalize()
'NJemačka'
I believe that the correct behaviour is to titlecase the first code point and
lowercase the rest, which is what the Apache library here does:
https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/StringUtils.html#capitalize-java.lang.String-
----------
messages: 339568
nosy: steven.daprano
priority: normal
severity: normal
status: open
title: str.capitalize should titlecase the first character not uppercase
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36549>
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