In python, how do I create two index slicing for my own matrix class?

I am trying to write my own matrix class in python, just for testing purposes. In reality, this matrix class is in c++ and I am using SWIG to interface between the two. However, for this question, it might be simpler to consider a pure python implementation of this matrix class.

I want to be able to call this matrix class and use two-indexed slicing. For example, after we create 4x4 matrix of ones,

>>> A = Matrix(4,4,1)

I want to be able to get the sub 2x2 matrix:

>>>> A[1:2,1:2]

I've heard of the __getslice__ method, but this seems like it only allows single slicing, e.g. A[1:2]. So how can perform a two-index slicing so I can call A[i:j,l:k]?

Thanks!

Answer