python stdout 重定向

 import sys

 class Buffer(object):
     def __init__(self):
         self.buffer = []

     def write(self, *args, **kwargs):
         self.buffer.append(args)

 def test():
     stdout = sys.stdout
     sys.stdout = open('hello_stdout', 'wb')

     print 'test'

     sys.stdout.close()
     sys.stdout = stdout

     stdout = sys.stdout
     sys.stdout = Buffer()

     print 'buffer1'
     print 'buffer2'

     buff, sys.stdout = sys.stdout, stdout
     print buff.buffer

 if __name__ == '__main__':
     test()

跟 decorator 用在一起会比较有趣

https://www.cnblogs.com/hangj/p/4986970.html

https://stackoverflow.com/questions/7664788/freopen-stdout-and-console