windows下解决python输出utf-8中文

class UnicodeStreamFilter:  
    def __init__(self, target):  
        self.target = target  
        self.encoding = 'utf-8'  
        self.errors = 'replace'  
        self.encode_to = self.target.encoding  
    def write(self, s):  
        if type(s) == str:  
            s = s.decode("utf-8")  
        s = s.encode(self.encode_to, self.errors).decode(self.encode_to)  
        self.target.write(s)  
          
if sys.stdout.encoding == 'cp936':  
    sys.stdout = UnicodeStreamFilter(sys.stdout)