diff --git a/function.py b/function.py
index b23487d..0577f2b 100644
--- a/function.py
+++ b/function.py
@@ -30,7 +30,7 @@ name = "万子玉"
 def sigmoid(z):
     return 1 / (1 + np.exp(-z))
 
-def train_logreg(X, y, learning_rate=0.001, iterations=500, batch_size=16, initial_weights=np.zeros(n_features + 1)):
+def train_logreg(X, y, learning_rate=0.001, iterations=500, batch_size=16, initial_weights=None):
     X = np.insert(X, 0, 1, axis=1)  # 添加偏置项
     if initial_weights is None:
         weights = np.zeros(X.shape[1])