diff --git a/function.py b/function.py
index aa9edcd..1982a05 100644
--- a/function.py
+++ b/function.py
@@ -73,7 +73,7 @@ def predict_logreg(X, weights):
     z = np.dot(X, weights)
     h = sigmoid(z)
     return np.where(h >= 0.5, 1, 0)
-    
+
 def load_data(filepath):
     data, labels = [], []
     with open(filepath, 'r') as f:
@@ -103,7 +103,9 @@ def load_data(filepath):
 
     return data, target_variable
 
-
+def accuracy(X, y, weights):
+    predictions = predict_logreg(X, weights)
+    return np.mean(predictions == y)
 
 # 其余代码保持不变
 if __name__ == "__main__":