setting STDOUT and/or STDERR

[Gribouillis]

It could work, if you set stderr and stdout to subprocess.PIPE.

I tried it but it doesn't work. Here is my script

# myscript.py
from contextlib import redirect_stdout, redirect_stderr
from pathlib import Path
import subprocess as sp
import sys


def main():
    # print our args
    print(sys.argv)
    sys.stdout.flush()

    # run some command which creates output
    sp.run(["date"], stdout=sp.PIPE, stderr=sp.PIPE) # OUTPUT IS LOST


with Path("/tmp/bigscript.log").open("w") as ofile:
    with redirect_stdout(ofile), redirect_stderr(ofile):
        main()

Output:
λ python paillasse/pf/myscript.py
λ cat /tmp/bigscript.log
['paillasse/pf/myscript.py']
λ 

I don't know where the output of sp.run(["date"], stdout=sp.PIPE, stderr=sp.PIPE) was sent.

On the other hand IT WORKS if I call instead explicitly

    sp.run(["date"], stdout=sys.stdout, stderr=sys.stderr)

This could be the pythonic way to go, but I don't think I could do this and redirect to an abstract file object without fileno, in order to make a tee for example.