Python equivalent of `set -x`

sh.py

import logging
import subprocess


def sh(cmd: str, *, quiet: bool = False) -> str:
    """
    The python equivalent of `set -x`.
    
    Runs the provided `cmd`, returning stdout.
    In case of a non-zero exit code, prints stdout and stderr.
    """

    PROMPT_CHARACTER = "$"

    if not quiet:
        logging.info(f"{PROMPT_CHARACTER} {cmd}")

    std_everything = bytearray()

    process = subprocess.Popen(
        cmd, shell=True, stderr=subprocess.STDOUT, stdout=subprocess.PIPE
    )

    # print the output of the command in real time
    for line in process.stdout:
        std_everything.extend(line)

        if not quiet:
            print(line.decode(), end="")

    return_code = process.wait()

    dec_std_everything = std_everything.decode("ascii")

    if return_code != 0:
        logging.info(f"{PROMPT_CHARACTER} {cmd}")
        logging.error(dec_std_everything)
        raise subprocess.CalledProcessError(returncode=return_code, cmd=process.args)

    return dec_std_everything