Quick example

That's an example of an option definition:

import sys
import argue

@argue.command(usage='%name [-n] MESSAGE')
def main(message, nonewline=('n', False, 'no newline')):
    'Simple echo program'
    sys.stdout.write(message)
    if not nonewline:
        sys.stdout.write('\n')

if __name__ == '__main__':
    main()

Running this program will print the help:

echo.py [-n] MESSAGE

Simple echo program

options:

 -n --nonewline  no newline
 -h --help       show help

I think this mostly describes what's going on, except that I'd like to mention one interesting feature - if you are using long name for option, you can use only partial name, for example ./echo.py --nonew a is valid command line. This is also true for subcommands: read about that and everything else you'd like to know in documentation.