http://docs.python.org/2/howto/unicode.htmlLatin-1, also known as ISO-8859-1, is a similar encoding. Unicode code points 0-255 are identical to the Latin-1 values, so converting to this encoding simply requires converting code points to byte values; if a code point larger than 255 is encountered, the string can’t be encoded into Latin-1.
在Documentation中提示unicode的0-255编码和Latin-1的0-255是一样的。说以u'\xb2\xe2\xca\xd4'.decode('Latin-1')转好之后就是'\xb2\xe2\xca\xd4'其实好像还是GB2312的编码