actually, re-running pipeline_from_decorator.py a second time (and a third time) from the command line seem to have executed without the that ValueError so maybe that issue was some fluke.
Nevertheless, those runs exit prior to line
print('process completed')
and I would definitely prefer the command executing_pipeline to not kill the process that called it.
For example, maybe, having started the pipeline I'd like my code to also report having started the pipeline to some other tool (e.g. send me a slack message about it)