python 输出重定向

使print既打印到终端，又写入文件

class Tee(object):
    def __init__(self,*files):
        self.files = files
    def write(self,obj):
        for f in self.files:
            f.write(obj)

if __name__ == '__main__':
    logname = './new_file.txt'
    with open(logname,'w') as logfile:
    　　original = sys.stdout
    　　sys.stdout = Tee(sys.stdout,logfile)
    　　// test
    　　print '*********************'
    　　print 'Well Done!'
    　　sys.stdout = original