Update app.py

app.py

@@ -5,6 +5,11 @@ from langchain.agents import AgentType, initialize_agent, tool
 from langchain.chat_models import ChatOpenAI
 from langchain_community.tools.tavily_search import TavilySearchResults
 
+from dotenv import load_dotenv, find_dotenv
+_ = load_dotenv(find_dotenv())
+
+TAVILY_API_KEY = os.environ["TAVILY_API_KEY"]
+
 config = {
     "max_tokens": 1000,
     "model_name": "gpt-4",