Implement str one

libs/langchain/langchain/output_parsers/json.py

@@ -172,15 +172,12 @@ class SimpleJsonOutputParser(BaseOutputParser[Any]):
         return "simple_json_output_parser"
 
 
-class PartialJsonOutputParser(BaseCumulativeTransformOutputParser[Any]):
-    from_function_args: bool = False
-
+class PartialFunctionsJsonOutputParser(BaseCumulativeTransformOutputParser[Any]):
     @property
     def _type(self) -> str:
-        return "partial_json"
+        return "partial_functions_json"
 
     def parse_result(self, result: List[Generation]) -> Any:
-        if self.from_function_args:
         if len(result) != 1:
             raise OutputParserException(
                 f"Expected exactly one result, but got {len(result)}"
@@ -202,3 +199,12 @@ class PartialJsonOutputParser(BaseCumulativeTransformOutputParser[Any]):
 
     def parse(self, text: str) -> Any:
         pass
+
+
+class PartialJsonOutputParser(BaseCumulativeTransformOutputParser[Any]):
+    @property
+    def _type(self) -> str:
+        return "partial_functions_json"
+
+    def parse(self, text: str) -> Any:
+        return parse_json_markdown(text)