Update app.py

app.py

@@ -31,8 +31,8 @@ load_dotenv()
 
 # # Retrieve OpenAI API key
 openai_api_key = os.getenv("OPENAI_API_KEY")
-# if openai_api_key is None:
-#     raise ValueError("The OPENAI_API_KEY environment variable is not set")
+if openai_api_key is None:
+     raise ValueError("The OPENAI_API_KEY environment variable is not set")
 
 # # Set the OpenAI API key for the OpenAI library
 openai.api_key = openai_api_key