How to use this feature? argparse is executed every time when the end user runs the program. But generating a man page is the action that should be executed at develop or build stage. The end user gets a generated man page, he doesn't need the option to generate a man page on a fly. The developer needs the ability to generate a man page rather than running the program for its main purpose. What should be the structure of the program that uses argparse for parsing arguments and for generating a man page? How generating a man page should be invoked?