Only invoked conditionally if subcommand is 'train'

def init_train_args(self, parser):
        '''Only invoked conditionally if subcommand is 'train' '''
        parser.add_argument('-f', '--configuration', dest='config', default=DEFAULT_USER_CONFIG_PATH,
                            help='the path to the configuration file to use -- ./config.yaml by default')
        parser.add_argument('-c', '--corpus-name', help='the name of the corpus or saved dataset to train on')