from sklearn.metrics import roc_auc_score

y_true = [0, 0, 1, 1, 1]
y_score = [0.1, 0.2, 0.7, 0.8, 0.9]
print(roc_auc_score(y_true, y_score))

y_score = [0.7, 0.8, 0.9, 0.1, 0.2]
print(roc_auc_score(y_true, y_score))

打印结果：

1.0
0.33333