[Python] Generate STDOUT lines from subprocess

subprocess_line_generator.py

#!/usr/bin/env python

import subprocess


def run_and_parse_subprocess(**popen_args):
    with subprocess.Popen(**popen_args) as p:
        for line in p.stdout:
            yield line.decode('utf-8')
        if p.poll() == 0:
            pass
        else:
            raise subprocess.CalledProcessError(
                returncode=p.returncode, cmd=p.args, output=p.stdout,
                stderr=p.stderr
            )


# Example
if __name__ == '__main__':
    sh_args = 'seq 10 | xargs -I {} bash -c "echo -n \\"{}: \\" && date && sleep 1"'
    for line in run_and_parse_subprocess(args=sh_args, stdout=subprocess.PIPE,
                                         shell=True, executable='/bin/bash'):
        print(line.strip(), flush=True)