New submission from Jean-Paul Calderone <exar...@divmod.com>:
This issue may extend beyond just unicode.upper() and unicode.lower(), but it's
very clear with these two methods, at least.
For example, consider DESERET SMALL LETTER EW. On a UTF-16 build, calling
upper on a string containing this doesn't change it to the capital variation
(DESERET CAPITAL LETTER EW):
>>> u'\N{DESERET SMALL LETTER EW}'.upper() == u'\N{DESERET SMALL LETTER EW}'
True
It can also be seen that this isn't even recognized as lower case:
>>> u'\N{DESERET SMALL LETTER EW}'.islower()
False
With a UTF-32 build, however, the expected behavior (ie, the behavior one would
get for a code point in the BMP with small and capital variations) is provided.
----------
components: Interpreter Core
messages: 97500
nosy: exarkun
severity: normal
status: open
title: UTF-16 build incorrectly translates cases for non-BMP code points
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue7663>
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