Fix conll2003.from_params incorrect default
@@ -167,7 +167,7 @@ class Conll2003DatasetReader(DatasetReader):
@classmethod
def from_params(cls, params: Params) -> 'Conll2003DatasetReader':
token_indexers = TokenIndexer.dict_from_params(params.pop('token_indexers', {}))
- tag_label = params.pop('tag_label', None)
+ tag_label = params.pop('tag_label', 'ner')
feature_labels = params.pop('feature_labels', ())
lazy = params.pop('lazy', False)
coding_scheme = params.pop('coding_scheme', 'IOB1')
