Eryk Sun <eryk...@gmail.com> added the comment:
Python uses standard Unicode character properties, as defined by the Unicode
Consortium. This issue is discussed in their FAQ [1]:
Q: Why does ß (U+00DF LATIN SMALL LETTER SHARP S) not uppercase to
U+1E9E LATIN CAPITAL LETTER SHARP S by default?
A: In standard German orthography, the sharp s ("ß") used to be
exclusively uppercased to a sequence of two capital S characters.
This longstanding practice is reflected in the default case
mappings in Unicode. A capital form of ß is sometimes preferred
for typographic reasons or to avoid ambiguity, such as in
uppercase names as found in passports. It is encoded in the
Unicode Standard as U+1E9E. While this character is not widely
used, [it] is now recognized in the official orthography as an
optional uppercase form of ß in addition to "SS". Because it is
only an optional alternative, the original mapping to "SS" is
retained in the Unicode character properties.
---
[1] http://unicode.org/faq/casemap_charprop.html#11
----------
nosy: +eryksun
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue43221>
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