Preserving The Dimensions Of A Slice From A Numpy 3d Array

I have a 3d array, a, of shape say a.shape = (10, 10, 10) When slicing, the dimensions are squeezed automatically i.e. a[:,:,5].shape = (10, 10) I'd like to preserve the number of

Solution 1:

a[:,:,[5]].shape
# (10,10,1)

---

a[:,:,5] is an example of basic slicing.

a[:,:,[5]] is an example of integer array indexing -- combined with basic slicing. When using integer array indexing the resultant shape is always "identical to the (broadcast) indexing array shapes". Since [5] (as an array) has shape (1,), a[:,:,[5]] ends up having shape (10,10,1).