从python子进程中获取adb命令的返回值

Question

import subprocess

while True:
    subprocess.call(input("> "), shell=True)

比方说，当我运行

adb shell settings get system volume_music_speaker

时，如何获取返回值并存储它，比如说，它是最大音量，所以返回值将是14。我已经尝试过

while True:
    a = subprocess.call(input("> "), shell=True)
    print(a)

但我总是得到 0。谢谢。

Answer 1

https://docs.python.org/3/library/subprocess.html#subprocess.PIPE

with subprocess.Popen(input("> "),
    shell=True,
    stdout=subprocess.PIPE,
    stderr=subprocess.PIPE,
) as your_process:
    output, err = your_process.communicate()