Update app.py

app.py

@@ -135,8 +135,8 @@ class BasicAgent:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         messages = [HumanMessage(content=f"{question}")]
 
-        messages = self.agent.invoke({"messages": messages})
-        answer = f"{messages[-1].content}"
+        state = self.agent.invoke({"messages": messages,"input_file": None})
+        answer = state["messages"][-1].content
         print(f"Agent returning answer: {answer}")
         return answer