python 编码与解码 decode解码 encode 编码

　　

>>> '无'   #gbk字符
'xcexde'
>>> str1 = 'xcexde'
>>> str1.decode('gbk')  # 解码gbk为 unicode
u'u65e0'
>>> str1.decode('gbk').encode('utf-8') # 解码gbk为 unicode   编码unicode 为utf-8
'xe6x97xa0'
>>> print str1.decode('gbk').encode('utf-8')
鏃