Update app.py

app.py

@@ -210,8 +210,8 @@ def handler(file: IO[bytes], algorithm: str, filtered: bool, truncated: bool, se
     df_wins = df_wins.reindex(labels=index, columns=index, fill_value=0, copy=False)
 
     df_ties = pd.pivot_table(df[df['winner'] == 'tie'],
-                             index='left', columns='right', values='winner', aggfunc='count',
-                             fill_value=0)
+                             index='left', columns='right', values='winner',
+                             aggfunc='count', fill_value=0)
     df_ties = df_ties.reindex(labels=index, columns=index, fill_value=0, copy=False)
 
     wins = df_wins.to_numpy(dtype=np.int64)