unicodedecodeerror: ascii codec cant decode byte

import sys
reload(sys)
sys.setdefaultencoding('utf8')

'''  UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in 

position 21: ordinal not in range(128)     Para resolver isso deve-se usar o reload(sys) e 

sys.setdefaultencoding('utf8') '''