在用wiki qa数据集做实验时，测试数据是问答对的形式，这样的话，每个问答对可以预测出一个0~1的概率值，请问您这种情况怎么使用NDCG指标呢？

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You may also provide a Minimal, Complete, and Verifiable example you tried as a workaround, or StackOverflow solution that you have walked through. (e.g. cosmic radiation).

In addition, figure out your MatchZoo version by running import matchzoo; matchzoo.__version__. If this gives you an error, then you're probably using 1.0, and 1.0 is no longer supported. Then attach the corresponding label on the issue.