dest is 'use_natural_primary_keys', default is boolean False and help is a string 'Use natural primary keys if they are available.'. call the method parser.add_argument with 6 arguments: string '-a', string '--all', action set to 'store_true',
parser . add_argument ( '-a' , '--all' , action = 'store_true' , dest = 'use_base_manager' , default = False , help = "Use Django's base manager to dump all models stored in the database, " "including those that would otherwise be filtered or modified by a custom manager." )