sh.py

from subprocess import check_output, CalledProcessError


def call_me(cmd, *args, **kwargs):
    cmd_list = [cmd]

    def wrap(*args, **kwargs):
        cmd_list.extend(args)
        try:
            return 0, check_output(cmd_list, **kwargs)
        except CalledProcessError as e:
            return e.returncode, e.output
    return wrap