python子进程执行bash脚本

from subprocess import check_output, STDOUT
cmd = "some cmd"

try:
    cmd_stdout = check_output(cmd,stderr=STDOUT, shell=True).decode()
except Exception as e:
    print(e.output.decode()) # print out the stdout messages up to the exception
    print("a") # To print out the exception message

参考

subprocess

How to catch exception output from Python subprocess.check_output()?