May should merge run_cmd and exec_cmd to one.

[zlj-zz]

def run_cmd(*args, cwd: Optional[str] = None) -> bool:
    """Run system command.

    Returns:
        (bool): Whether run successful.

    Docs test
        >>> run_cmd('pwd')
        True
        >>> run_cmd('which', 'python')
        True
    """

    try:
        # ? In python2, `subprocess` not support `with` sentence.
        proc = subprocess.Popen(" ".join(args), shell=True, cwd=cwd)
        proc.wait()
    except Exception:
        Log.error(traceback_info())
        return False
    else:
        return True


def exec_cmd(*args, cwd: Optional[str] = None) -> Tuple[str, str]:
    """Run system command and get result.

    Returns:
        (str, str): Error string and result string.
    """

    try:
        # Take over the input stream and get the return information.
        with subprocess.Popen(
            " ".join(args),
            stderr=subprocess.PIPE,
            stdout=subprocess.PIPE,
            shell=True,
            cwd=cwd,
        ) as proc:

            output = proc.communicate()
            # Get normal output and error output.
            res = output[0].decode()
            err = output[1].decode()
    except Exception as e:
        Log.error(traceback_info())
        return str(e), ""
    else:
        return err, res

Can use one parameter to contrl whether return result or ouput to shell.