Running python3-pip-skeleton with no arguments generates unhelpful error

[AlexanderWells-diamond]

$ python3-pip-skeleton
Traceback (most recent call last):
  File "/home/eyh46967/dev/python3-pip-skeleton-cli/venv/bin/python3-pip-skeleton", line 8, in <module>
    sys.exit(main())
  File "/home/eyh46967/dev/python3-pip-skeleton-cli/src/python3_pip_skeleton/__main__.py", line 264, in main
    args.func(args)
AttributeError: 'Namespace' object has no attribute 'func'

This error is unhelpful. I would expect the help message to be displayed if no arguments are given.

I personally solved this recently with the following extended ArgumentParser:

    class CustomParser(ArgumentParser):
        def error(self, message):
            # Without this, calling the module with no command line arguments
            # only prints an error message, not the help or usage
            sys.stderr.write("error: %s\n" % message)
            self.print_help()
            sys.exit(2)

    parser = CustomParser(prog="github_members")

but I'm sure there are many ways to solve this.