Update rag_langgraph.py

rag_langgraph.py

@@ -2,7 +2,6 @@ from typing import Annotated, List, Tuple, Union
 
 from langchain_community.tools.tavily_search import TavilySearchResults
 from langchain_core.tools import tool
-from langchain_experimental.tools import PythonREPLTool
 
 from langchain.agents import AgentExecutor, create_openai_tools_agent
 from langchain_core.messages import BaseMessage, HumanMessage
@@ -94,10 +93,10 @@ def create_graph(topic, word_count):
         | JsonOutputFunctionsParser()
     )
 
-    research_agent = create_agent(llm, [tavily_tool], "Research content on topic {topic}")
+    research_agent = create_agent(llm, [tavily_tool], f"Research content on topic {topic}")
     research_node = functools.partial(agent_node, agent=research_agent, name="Researcher")
     
-    blogger_agent = create_agent(llm, [], "Write a {word_count}-word blog post on topic {topic}")
+    blogger_agent = create_agent(llm, [], f"Write a {word_count}-word blog post on topic {topic}")
     blogger_node = functools.partial(agent_node, agent=blogger_agent, name="Blogger")
     
     workflow = StateGraph(AgentState)