fix vocab_size to property

sentencepiece_ja.py

@@ -28,10 +28,11 @@ class SentencePieceJA(PreTrainedTokenizer):
             'unk_token': unk,
             'mask_token': mask
         })
-
+    
     def get_vocab(self) -> int:
         return self._tokenizer.get_vocab()
-
+    
+    @property
     def vocab_size(self) -> int:
         return self._tokenizer.get_vocab_size()
 

tokenizer_config.json

@@ -9,5 +9,6 @@
   "tokenizer_class": "SentencePieceJA",
   "auto_map": {
     "AutoTokenizer": ["","sentencepiece_ja.SentencePieceJA"]
-  }
+  },
+  "transformers_version": " 4.34.1"
 }