okay inline arguemnts are not readable

app.py

@@ -52,7 +52,7 @@ sample_image = st.sidebar.selectbox(
     "",
     sample_images,
     index = 0 if select_idx is None else select_idx,
-    on_change=OnChange(index)
+    on_change=OnChange(0)
 )
 
 st.sidebar.title("Select a Subreddit")