Reset deanonymizer mapping (#11559)

@hwchase17 @baskaryan

libs/experimental/langchain_experimental/data_anonymizer/base.py

@@ -47,3 +47,7 @@ class ReversibleAnonymizerBase(AnonymizerBase):
         deanonymizer_matching_strategy: Callable[[str, MappingDataType], str],
     ) -> str:
         """Abstract method to deanonymize text"""
+
+    @abstractmethod
+    def reset_deanonymizer_mapping(self) -> None:
+        """Abstract method to reset deanonymizer mapping"""

libs/experimental/langchain_experimental/data_anonymizer/presidio.py

@@ -313,6 +313,10 @@ class PresidioReversibleAnonymizer(PresidioAnonymizerBase, ReversibleAnonymizerB
 
         return text_to_deanonymize
 
+    def reset_deanonymizer_mapping(self) -> None:
+        """Reset the deanonymizer mapping"""
+        self._deanonymizer_mapping = DeanonymizerMapping()
+
     def save_deanonymizer_mapping(self, file_path: Union[Path, str]) -> None:
         """Save the deanonymizer mapping to a JSON or YAML file.