I have a list of numpy arrays, that I want to convert into a single int numpy array.  

For example if I have 46 `4 x 4` numpy arrays in a list of dimension `2 x 23`, I want to convert it into a single integer numpy array of `2 x 23 x 4 x 4` dimension. I have found a way to do this by going through every single element and using `numpy.stack()`. Is there any better way?