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