Capture output from subprocess of a subprocess

Question

So I am using the following in my script to capture the stdout and stderr output from my subprocess:

output = subprocess.check_output( cmd, stderr=subprocess.STDOUT )

This is working swimmingly, however, my subprocess has a subprocess it itself calls. The subprocess it itself calls has output I would like to capture. However, with my current set up, I only capture the output of the subprocess I create, and do not receive any of the output of it's child process.

Is there any way I can capture the output of any child subprocess spawned by a subprocess that my code is starting?

ZZ ll · Accepted Answer · 2018-04-18 22:03:01Z

The process cannot access to the output of the sub-subprocess so the intermediate subprocess has to behave as a proxy (it writes in its output the output of the sub-subprocess) or the sub-subprocess has to send its output somewhere (a temporary file for example) which will be read by the process

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