def assert_cmd_failure(cmd, **kwargs):
    print(">>>", cmd, kwargs)
    (r, out, err) = run(cmd, withexitstatus=True, **kwargs)
    print("<<<", str(out))
    assert 0 != r, "cmd succeeded, but it should fail: %s result=%u\noutput=\n%s" % (cmd, r, out)
    return out
Initialize all valid properties.
dataset/ETHPy150Open catkin/catkin_tools/tests/utils.py/assert_cmd_failure--crossover with--dataset/ETHPy150Open smart-on-fhir/client-py/fhirclient/models/attachment.py/Attachment.__init__