Update app.py

app.py

@@ -40,5 +40,8 @@ if example_2:
     st.markdown("## "+output_text)
 if button:
     with st.spinner('In progress.......'):
-        output_text = model(textbox)[0]["generated_text"]
+        if textbox:
+            output_text = model(textbox)[0]["generated_text"]
+        else:
+            output_text = " "
     st.markdown("## "+output_text)