Update app.py

app.py

@@ -4,7 +4,11 @@ from dotenv import load_dotenv
 import google.generativeai as gen_ai
 
 # Load environment variables
-load_dotenv()
+try:
+    load_dotenv()
+except ModuleNotFoundError:
+    st.error("The `python-dotenv` module is not installed. Please install it using `pip install python-dotenv`.")
+    st.stop()
 
 # Configure Streamlit page settings
 st.set_page_config(