Tokenizer.batch_decode convenience method (#4159)

src/transformers/tokenization_marian.py

@@ -124,9 +124,6 @@ class MarianTokenizer(PreTrainedTokenizer):
         # We don't expect to process pairs, but leave the pair logic for API consistency
         return token_ids_0 + token_ids_1 + [self.eos_token_id]
 
-    def batch_decode(self, token_ids, **kwargs) -> List[str]:
-        return [self.decode(ids, **kwargs) for ids in token_ids]
-
     def prepare_translation_batch(
         self,
         src_texts: List[str],

src/transformers/tokenization_utils.py

@@ -2183,6 +2183,9 @@ class PreTrainedTokenizer(SpecialTokensMixin):
         else:
             return text
 
+    def batch_decode(self, sequences: List[List[int]], **kwargs) -> List[str]:
+        return [self.decode(seq, **kwargs) for seq in sequences]
+
     @staticmethod
     def clean_up_tokenization(out_string: str) -> str:
         """ Clean up a list of simple English tokenization artifacts like spaces before punctuations and abreviated forms.