Update app.py

app.py

@@ -46,7 +46,7 @@ def aggregate(wins: npt.NDArray[np.int64], ties: npt.NDArray[np.int64],
         )
 
         v = v_numerator / v_denominator
-        v = np.nan_to_num(v, copy=False)
+        v = np.nan_to_num(v, copy=False, nan=tolerance)
 
         pi_old = pi.copy()
 
@@ -63,14 +63,18 @@ def aggregate(wins: npt.NDArray[np.int64], ties: npt.NDArray[np.int64],
         )
 
         pi = pi_numerator / pi_denominator
-        pi = np.nan_to_num(pi, copy=False)
+        pi = np.nan_to_num(pi, copy=False, nan=tolerance)
 
-        converged = bool(np.all(np.abs(pi / (pi + 1) - pi_old / (pi_old + 1)) < tolerance)) or (iterations >= limit)
+        converged = np.allclose(pi / (pi + 1), pi_old / (pi_old + 1),
+                                rtol=tolerance, atol=tolerance) or (iterations >= limit)
 
     return pi
 
 
 def handler(file: typing.IO[bytes], seed: int) -> pd.DataFrame:
+    if file is None:
+        raise gr.Error('File must be uploaded')
+
     try:
         df = pd.read_csv(file.name, dtype=str)
     except ValueError as e: