add submit button

app.py

@@ -23,5 +23,6 @@ data = st.text_input(
     "Enter Text", "Just started school at NYU! Looking forward to this new chapter!"
 )
 
-results = sentiment_analysis([data])
-st.write(results)
+if st.button("Submit"):
+    results = sentiment_analysis([data])
+    st.write(results)