Update app.py

app.py

@@ -18,13 +18,15 @@ def get_text():
 
 
 user_input=get_text()
-response=load_answer(user_input)
 
 submit = st.button('Generate')
 
 if submit:
+    if not user_input.strip():
+        st.write("Please enter a question. ")
 
-    st.subheader("Answer: ")
-
-    st.write(response)
+    else:
+        response= load_answer(user_input)
+        st.subheader("Answer: ")
+        st.write(response)