python 输出重定向

使print既打印到终端，又写入文件

 1 class Tee(object):
 2     def __init__(self,*files):
 3         self.files = files
 4     def write(self,obj):
 5         for f in self.files:
 6             f.write(obj)
 7 
 8 if __name__ == '__main__':
 9     logname = './new_file.txt'
10     with open(logname,'w') as logfile:
11     　　original = sys.stdout
12     　　sys.stdout = Tee(sys.stdout,logfile)
13     　　// test
14     　　print '*********************'
15     　　print 'Well Done!'
16     　　sys.stdout = original