numpy中find的等效项是nonzero，但它不支持第二个参数. 但是您可以执行类似的操作来获得您想要的行为.

The equivalent of find in numpy is nonzero, but it does not support a second parameter. But you can do something like this to get the behavior you are looking for.

B = nonzero(A >= 9)[0] 

但是，如果您要寻找的是找到满足条件的第一个元素，那么***使用max.

But if all you are looking for is finding the first element that satisfies a condition, you are better off using max.

例如，在matlab中，find(A >= 9, 1)将与[idx, B] = max(A >= 9)相同. numpy中的等效函数如下.

For example, in matlab, find(A >= 9, 1) would be the same as [idx, B] = max(A >= 9). The equivalent function in numpy would be the following.

idx = (A >= 9).argmax()