feat: merge PR aimacode#1292

Author: weasdown

learning4e.py

@@ -910,7 +910,7 @@ def weighted_replicate(seq, weights, n):
 
 def accuracy_score(y_pred, y_true):
     assert y_pred.shape == y_true.shape
-    return np.mean(np.equal(y_pred, y_true))
+    return np.mean(y_pred == y_true)
 
 
 def r2_score(y_pred, y_true):