update experimental (#8402)

some changes were made to experimental, porting them over

libs/experimental/langchain_experimental/plan_and_execute/planners/base.py

@@ -9,6 +9,8 @@ from langchain_experimental.plan_and_execute.schema import Plan, PlanOutputParse
 
 
 class BasePlanner(BaseModel):
+    """Base planner."""
+
     @abstractmethod
     def plan(self, inputs: dict, callbacks: Callbacks = None, **kwargs: Any) -> Plan:
         """Given input, decide what to do."""
@@ -17,13 +19,18 @@ class BasePlanner(BaseModel):
     async def aplan(
         self, inputs: dict, callbacks: Callbacks = None, **kwargs: Any
     ) -> Plan:
-        """Given input, decide what to do."""
+        """Given input, asynchronously decide what to do."""
 
 
 class LLMPlanner(BasePlanner):
+    """LLM planner."""
+
     llm_chain: LLMChain
+    """The LLM chain to use."""
     output_parser: PlanOutputParser
+    """The output parser to use."""
     stop: Optional[List] = None
+    """The stop list to use."""
 
     def plan(self, inputs: dict, callbacks: Callbacks = None, **kwargs: Any) -> Plan:
         """Given input, decide what to do."""
@@ -33,7 +40,7 @@ class LLMPlanner(BasePlanner):
     async def aplan(
         self, inputs: dict, callbacks: Callbacks = None, **kwargs: Any
     ) -> Plan:
-        """Given input, decide what to do."""
+        """Given input, asynchronously decide what to do."""
         llm_response = await self.llm_chain.arun(
             **inputs, stop=self.stop, callbacks=callbacks
         )