Fix conflicting key in init kwargs in PreTrainedTokenizerBase (#31233)

* Fix conflicting key in init kwargs in PreTrainedTokenizerBase

* Update code to check for callable key in save_pretrained

* Apply PR suggestions

* Invoke CI

* Updates based on PR suggestion

src/transformers/tokenization_utils_base.py

@@ -1569,6 +1569,10 @@ class PreTrainedTokenizerBase(SpecialTokensMixin, PushToHubMixin):
     def __init__(self, **kwargs):
         # inputs and kwargs for saving and re-loading (see ``from_pretrained`` and ``save_pretrained``)
         self.init_inputs = ()
+        for key in kwargs:
+            if hasattr(self, key) and callable(getattr(self, key)):
+                raise AttributeError(f"{key} conflicts with the method {key} in {self.__class__.__name__}")
+
         self.init_kwargs = copy.deepcopy(kwargs)
         self.name_or_path = kwargs.pop("name_or_path", "")
         self._processor_class = kwargs.pop("processor_class", None)

tests/test_tokenization_common.py

@@ -4408,3 +4408,11 @@ class TokenizerTesterMixin:
                         replace_additional_special_tokens=False,
                     )
                     self.assertEqual(tokenizer_2.additional_special_tokens, ["<other>", "<another>", "<tok>"])
+
+    def test_tokenizer_initialization_with_conflicting_key(self):
+        get_tokenizer_func = self.get_rust_tokenizer if self.test_rust_tokenizer else self.get_tokenizer
+        with self.assertRaises(AttributeError, msg="conflicts with the method"):
+            get_tokenizer_func(add_special_tokens=True)
+
+        with self.assertRaises(AttributeError, msg="conflicts with the method"):
+            get_tokenizer_func(get_vocab=True)