For 2D arrays C only works with numpy.ndarray

[ali-ramadhan]

The problem modules try to produce native Python types to pass as input arguments.

This is usually good, but for problem with 2D array inputs like Game of Life, C needs numpy.ndarray inputs. C also generally likes numpy arrays as they're all of the same type arr.dtype.

So might make sense to use numpy.ndarray internally so C is happy, and maybe we pass arr.tolist() to Python or something. Not sure of the best solution.

This might be an issue for other staticly typed languages too.