utils.py 文件源码

def cli_call(arg_list, expect_success=True, env=os.environ.copy()):
    """Executes a CLI command in a subprocess and return the results.

    Args:
        arg_list: a list command arguments
        expect_success: use False to return even if an error occurred
                        when executing the command
        env:

    Returns: (string, string, int) output message, error message, return code

    """
    p = subprocess.Popen(arg_list, stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE, env=env)
    output, error = p.communicate()
    if p.returncode != 0:
        if output:
            print("Output:\n" + str(output))
        if error:
            print("Error Message:\n" + str(error))
        if expect_success:
            raise subprocess.CalledProcessError(
                p.returncode, arg_list, output)
    return output, error, p.returncode