python <type 'exceptions.UnicodeDecodeError'>: 'ascii' codec can't decode byte 0xe6 in position 0: ordinal not in range(128)解决

python : 'ascii' codec can't decode byte 0xe6 in position 0: ordinal not in range(128)

import sys
import os
import string
reload(sys)
sys.setdefaultencoding("utf8")