[issue12753] \N{...} neglects formal aliases and named sequences from Unicode charnames namespace

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

The attached patch changes Tools/unicode/makeunicodedata.py to create a list of names and codepoints taken from http://www.unicode.org/Public/6.0.0/ucd/NameAliases.txt and adds it to Modules/unicodename_db.h.
During the lookup the _getcode function at Modules/unicodedata.c:1055 loops over the 11 aliases and checks if any of those match.
The patch also includes tests for both unicodedata.lookup and \N{}.

I'm not sure this is the best way to implement this, and someone will probably want to review and tweak both the approach and the C code, but it works fine:
>>> "\N{LATIN CAPITAL LETTER GHA}"
'Ƣ'
>>> import unicodedata
>>> unicodedata.lookup("LATIN CAPITAL LETTER GHA")
'Ƣ'
>>> "\N{LATIN CAPITAL LETTER OI}"
'Ƣ'
>>> unicodedata.lookup("LATIN CAPITAL LETTER OI")
'Ƣ'

The patch doesn't include changes for NamedSequences.txt.

----------
keywords: +patch
nosy: +lemburg, loewis
Added file: http://bugs.python.org/file23273/issue12753.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12753>
_______________________________________