add missing packages

agent.py

@@ -1,12 +1,12 @@
 from langchain_community.chat_models import ChatHuggingFace
 from langchain_community.llms import HuggingFaceEndpoint
-from langchain_community.tools.python.tool import PythonREPLTool
 
 # --- Custom Tools ---
 from langchain_community.tools.tavily_search import TavilySearchResults
 from langchain_core.messages import AIMessage, HumanMessage, SystemMessage
 from langchain_core.runnables import RunnableLambda
 from langchain_core.tools import tool
+from langchain_experimental.tools.python.tool import PythonREPLTool
 from langgraph.graph import END, START, MessagesState, StateGraph
 from langgraph.graph.message import add_messages
 from langgraph.prebuilt import ToolNode, tools_condition

requirements.txt

@@ -3,6 +3,7 @@ requests
 langchain
 langchain-core
 langchain-community
+langchain-experimental
 langchain-tavily
 langgraph
 tavily-python