Update app.py

app.py

@@ -83,7 +83,7 @@ if submitted:
         except:
             selected_df = pd.DataFrame()
             pass
-    if len(selected_df) != 0:
+    if len(selected_df) != 0 or selected_df != None:
         st.success('Feature vector successfully created.')
         csv = convert_df(selected_df)