Update app.py

app.py

@@ -6,7 +6,8 @@ st.title("What's the category?")
 
 text = st.text_input("Enter words")
 
-candidate_labels = ['lifestyle', 'technology', 'entertainment', 'news']
-res = classifier("Today is a good day to have a good day", candidate_labels)
+if text is not None:
+    candidate_labels = ['lifestyle', 'technology', 'entertainment', 'news']
+    res = classifier("Today is a good day to have a good day", candidate_labels)
 
-st.markdown(f'Well here you go: {res}')
+    st.markdown(f'Well here you go: {res}')