nl: dest as a string 'use_default_ignore_patterns', default set to boolean True, and help as a string "Don't ignore the common glob-style patterns 'CVS', '.*', '*~' and '*.pyc'.". call the method parser.add_argument with 5 arguments: string '--no-wrap', action as a string 'store_true', dest as a string 'no_wrap',
code: parser . add_argument ( '--no-wrap' , action = 'store_true' , dest = 'no_wrap' , default = False , help = "Don't break long message lines into several lines." )