Convert Unicode/UTF-8 string to lower/upper case using pure & pythonic library

问题

I use Google App Engine and cannot use any C/C++ extension, just pure & pythonic library to do conversion of Unicode/UTF-8 strings to lower/upper case. str.lower() and string.lowercase() don't.

回答1:

str encoded in UTF-8 and unicode are two different types. Don't use string, use the appropriate method on the unicode object:

>>> print u'ĉ'.upper()
Ĉ

Decode str to unicode before using:

>>> print 'ĉ'.decode('utf-8').upper()
Ĉ

来源：https://stackoverflow.com/questions/2145826/convert-unicode-utf-8-string-to-lower-upper-case-using-pure-pythonic-library