add set to DEFAULT_DB_ALIAS and help is 'Nominates a specific database to dump fixtures from. Defaults to the "default" database.'. call the method parser.add_argument with 6 arguments: string '-e', string '--exclude', dest set to 'exclude', action set to 'append',
parser . add_argument ( '-e' , '--exclude' , dest = 'exclude' , action = 'append' , default = [ ] , help = 'An app_label or app_label.ModelName to exclude ' '(use multiple --exclude to exclude multiple apps/models).' )