python 2.7 lowercase

问题

When I use .lower() in Python 2.7, string is not converted to lowercase for letters ŠČŽ. I read data from dictionary.

I tried using str(tt["code"]).lower(), tt["code"].lower().

Any suggestions ?

回答1:

Use unicode strings:

drostie@signy:~$ python
Python 2.7.2+ (default, Oct  4 2011, 20:06:09) 
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print "ŠČŽ"
ŠČŽ
>>> print "ŠČŽ".lower()
ŠČŽ
>>> print u"ŠČŽ".lower()
ščž

See that little u? That means that it's created as a unicode object rather than a str object.

回答2:

Use unicode:

>>> print u'ŠČŽ'.lower().encode('utf8')
ščž
>>>

You need to convert your text to unicode as soon as it enters your programme from the outside world, rather than merely at the point at which you notice an issue.

Accordingly, either use the codecs module to read in decoded text, or use 'bytestring'.decode('latin2') (where in place of latin2 you should use whatever the actual encoding is).

来源：https://stackoverflow.com/questions/9943169/python-2-7-lowercase