http://blog.chinaunix.net/u/24950/showart_192365.html

先举个例子：

#coding: gbk

unicodestring = u”Hello, 中国”

#Convent Unicode to plain Python string: “encode”

utf8string = unicodestring.encode(“utf-8”)

utf16string = unicodestring.encode(“utf-16”)

gbkstring = unicodestring.encode(“gbk”)

cp932string = unicodestring.encode(“cp932”)

#Convent plain Python string to Unicode: “decode”

unicodestring1 = unicode(utf8string, “utf-8”)

unicodestring2 = unicode(utf16string, “utf-16”)

unicodestring3 = unicode(gbkstring, “gbk”)

unicodestring4 = unicode(cp932string, “cp932”)

概括的说，调用一个unicode对象的encode方法，返回相应编码的string对象；调用某种编码的string对象的decode或调用unicode方法，返回一个unicode对象