Update src/streamlit_app.py

src/streamlit_app.py

@@ -27,11 +27,9 @@ if uploaded_file:
         # Save to leaderboard
         if os.path.exists(LEADERBOARD_FILE):
             df = pd.read_csv(LEADERBOARD_FILE)
-            df = df.append(entry, ignore_index=True)
+            df = pd.concat([df, pd.DataFrame([entry])], ignore_index=True)
         else:
             df = pd.DataFrame([entry])
-        df.to_csv(LEADERBOARD_FILE, index=False)
-        st.success(f"Submission scored {score}!")
     except Exception as e:
         st.error(f"Error: {e}")