fix: add dependencies

basic_agent.py

@@ -11,6 +11,12 @@ from typing import TypedDict, Sequence, Annotated
 from langchain_core.messages import BaseMessage, HumanMessage, AIMessage, SystemMessage
 from langchain_openai import ChatOpenAI
 
+from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder
+from langchain.agents import create_tool_calling_agent, AgentExecutor
+
+
+from basic_agent import print_conversation, generate_final_answer
+
 
 
 def print_conversation(messages):