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Normally, to add a subparser in argparse you have to do: parser = ArgumentParser() subparsers = parser.add_subparser() subparser = subparsers.add_parser() The problem I'm having is I'm trying to add another command line script, with its own parser, as a subcommand of my main script. Is there an easy way to do this? EDIT: To clarify, I have a file script.py that looks something like this: def initparser(): parser = argparse.ArgumentParser() parser.add_argument('--foo') parser.add_argument('--bar') return parser def func(args): #args is a Namespace, this function does stuff with it if __name__ == '__main__': initparser().parse_args() So I can run this like: python script.py --foo --bar I'm trying to write a module app.py that's a command line interface with several subcommands, so i can run something like: python app.py script --foo --bar Rather than copy and pasting all of the initparser() logic over to app.py , I'd like to be able to directly use the parser i create from initparser() as a sub-parser. Is this possible?

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