Can you say where the documentation is wrong or could be clarified. The case you are showing is explained in this section: https://numpy.org/devdocs/user/basics.indexing.html#indexing-multi-dimensional-arrays and while I am sure it can be improved it seems correct on first glance.

Can you say where the documentation is wrong or could be clarified. The case you are showing is explained in this section: https://numpy.org/devdocs/user/basics.indexing.html#indexing-multi-dimensional-arrays and while I am sure it can be improved it seems correct on first glance.

An example of the the case I presented can't be found at the indexing page.
Specifically the developers imply the following:

So using an index for array A like A[x][y] or A[x,y] should lead to the same output according to the documentation. Which is the case for a 1 dimensional input. But the code I presented shows a different thing. The 2 print statements actually differin output!.

So one of the two things is the case:
The documentation is wrong about the equality of the 2 indexing possibilities. Or there is a structural bug in which leads to 2 different outputs. I hope I clarified the issue.

The documentation you refer to is under the heading Single element indexing. You are not using a single element,.

The documentation you refer to is under the heading Single element indexing. You are not using a single element,.

That doesn't change anything, even in the paragraph of multidimensional array indexing this issue/phenomenon doesn't appear.

There is an important distinction between two different kinds of indexing behavior that are both accessed with the [] syntax: "basic" and "advanced" indexing. The case you originally reference from the documentation (x[0][2] == x[0, 2]) holds for basic indexing, but in your case, x and y are arrays, which triggers advanced indexing, which has different behavior. Note that the indexing article in the reference guide is a bit more clear on this distinction than the one in the user guide linked above. Hopefully this helps - if you have ideas for improvements to the various documentation pages on indexing (see e.g. #14038), please feel free to propose changes!

I'm going to go ahead and close this for now - any ideas related to specific improvements to the indexing documentation are more than welcome!