How can I 'compound' streams?

[XiaQ]

I need to build a stream that writes to stdout and a file at the same
time. Is there already a function in the Python library to do this?

[Dan Bishop]

Re: How can I 'compound' streams?

On Jun 27, 7:40 pm, XiaQ <hn_sd_ywx_x... @163.comwrote:

I need to build a stream that writes to stdout and a file at the same
time. Is there already a function in the Python library to do this?

class FileAndStdout(f ile):
def write(self, data):
file.write(self , data)
sys.stdout.writ e(data)