Update app.py

app.py

@@ -15,7 +15,11 @@ def get_text():
     return input_text
 
 user_input=get_text()
-response=load_answer(user_input)
+
+if not user_input:
+    st.warning("Please enter a question before generating")
+else:
+    response=load_answer(user_input)
 
 submit=st.button('Generate')