fix: (issue huggingface#32689) AttributeError raised when using `Tr…

…ainer` with `eval_on_start=True` in Jupyter Notebook. (huggingface#32849)

fix: `AttributeError` raised when using `Trainer` with `eval_on_start=True` in Jupyter Notebook.

src/transformers/utils/notebook.py

@@ -114,6 +114,8 @@ def __init__(
         self.last_value = None
         self.comment = None
         self.output = None
+        self.value = None
+        self.label = None
 
     def update(self, value: int, force_update: bool = False, comment: str = None):
         """