Update agent.py

agent.py

@@ -70,9 +70,9 @@ class BasicAgent():
         
         if file_name is not None and file_name!='':
             print(f"Provided file: {file_name}.")
-            messages=[[sys_msg] + HumanMessage(content=f"{question}. The file you have access to is {file_name}.")]
+            messages=[sys_msg] + [HumanMessage(content=f"{question}. The file you have access to is {file_name}.")]
         else:
-            messages=[[sys_msg] + HumanMessage(content=question)]
+            messages=[sys_msg] + [HumanMessage(content=question)]
             
         response = self.agent.invoke({"messages":messages}, config={"callbacks": [self.langfuse_handler]})
         answer = response['messages'][-1].content