范例01：
y_true := array("cat", "ant", "cat", "cat", "ant", "bird");
y_pred := array("ant", "ant", "cat", "cat", "ant", "cat");
sample_weight := array(1,1.5,2,1,1,3);
echo Accuracy_Score(y_true, y_pred, False);//相等元素个数 5.5
return Accuracy_Score(y_true, y_pred, true, sample_weight);
//准确率 0.5789
范例02：
// y_true 为矩阵时，一行 每个元素 都相等 算一个
y_true := array((0, 1), (1,1));
y_pred := array((1, 1), (1,1));
return Accuracy_Score(y_true, y_pred); //准确率 0.5