Run python shell command, return merged stdout and stderr, and exit code

main.py

import subprocess
from typing import Tuple

def run_cmd(cmd: str) -> Tuple[int, str]:
    p = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    output, _ = p.communicate()
    return p.returncode, output.decode("utf-8")

print(run_cmd("ls /"))
print(run_cmd("ls /does-not-exist"))