Update app.py

app.py

@@ -14,8 +14,22 @@ from fastapi.middleware.cors import CORSMiddleware
 from llama_index.core.agent import ReActAgent
 from llama_index.tools.duckduckgo import DuckDuckGoSearchToolSpec
 from llama_index.core.llms import ChatMessage
+
+
+
+
 import nltk
-nltk.download('punkt')
+import ssl
+
+try:
+_create_unverified_https_context = ssl._create_unverified_context
+except AttributeError:
+pass
+else:
+ssl._create_default_https_context = _create_unverified_https_context
+
+nltk.download()
+
 
 dotenv.load_dotenv()