详细解释见：UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode
简而言之，在python中对中文的匹配，如果采用Unicode编码：
u'Hello' == 'Hello'
True
u'Hello' == '\x81\x01'
main:1: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
False
