Refactor ConversationChain and LLMCheckerChain components

src/backend/langflow/components/chains/ConversationChain.py

@@ -1,9 +1,9 @@
-from typing import Callable, Optional, Union
+from typing import Optional
 
 from langchain.chains import ConversationChain
 
 from langflow import CustomComponent
-from langflow.field_typing import BaseLanguageModel, BaseMemory, Chain, Text
+from langflow.field_typing import BaseLanguageModel, BaseMemory, Text
 
 
 class ConversationChainComponent(CustomComponent):
@@ -26,7 +26,7 @@ class ConversationChainComponent(CustomComponent):
         inputs: str,
         llm: BaseLanguageModel,
         memory: Optional[BaseMemory] = None,
-    ) -> Union[Chain, Callable, Text]:
+    ) -> Text:
         if memory is None:
             chain = ConversationChain(llm=llm)
         else:

src/backend/langflow/components/chains/LLMCheckerChain.py

@@ -1,14 +1,15 @@
-from typing import Callable, Union
-
 from langchain.chains import LLMCheckerChain
+
 from langflow import CustomComponent
-from langflow.field_typing import BaseLanguageModel, Chain
+from langflow.field_typing import BaseLanguageModel, Text
 
 
 class LLMCheckerChainComponent(CustomComponent):
     display_name = "LLMCheckerChain"
     description = ""
-    documentation = "https://python.langchain.com/docs/modules/chains/additional/llm_checker"
+    documentation = (
+        "https://python.langchain.com/docs/modules/chains/additional/llm_checker"
+    )
 
     def build_config(self):
         return {
@@ -17,6 +18,12 @@ class LLMCheckerChainComponent(CustomComponent):
 
     def build(
         self,
+        inputs: str,
         llm: BaseLanguageModel,
-    ) -> Union[Chain, Callable]:
+    ) -> Text:
-        return LLMCheckerChain.from_llm(llm=llm)
+
+        chain = LLMCheckerChain.from_llm(llm=llm)
+        response = chain.invoke({chain.input_key: inputs})
+        result = response.get(chain.output_key)
+        self.status = result
+        return result

src/backend/langflow/components/chains/LLMMathChain.py

@@ -1,15 +1,17 @@
-from typing import Callable, Optional, Union
+from typing import Optional
 
 from langchain.chains import LLMChain, LLMMathChain
 
 from langflow import CustomComponent
-from langflow.field_typing import BaseLanguageModel, BaseMemory, Chain
+from langflow.field_typing import BaseLanguageModel, BaseMemory, Text
 
 
 class LLMMathChainComponent(CustomComponent):
     display_name = "LLMMathChain"
     description = "Chain that interprets a prompt and executes python code to do math."
-    documentation = "https://python.langchain.com/docs/modules/chains/additional/llm_math"
+    documentation = (
+        "https://python.langchain.com/docs/modules/chains/additional/llm_math"
+    )
 
     def build_config(self):
         return {
@@ -22,10 +24,21 @@ class LLMMathChainComponent(CustomComponent):
 
     def build(
         self,
+        inputs: Text,
         llm: BaseLanguageModel,
         llm_chain: LLMChain,
         input_key: str = "question",
         output_key: str = "answer",
         memory: Optional[BaseMemory] = None,
-    ) -> Union[LLMMathChain, Callable, Chain]:
+    ) -> Text:
-        return LLMMathChain(llm=llm, llm_chain=llm_chain, input_key=input_key, output_key=output_key, memory=memory)
+        chain = LLMMathChain(
+            llm=llm,
+            llm_chain=llm_chain,
+            input_key=input_key,
+            output_key=output_key,
+            memory=memory,
+        )
+        response = chain.invoke({input_key: inputs})
+        result = response.get(output_key)
+        self.status = result
+        return result