Pythonic way to create a numpy array from a list of numpy arrays

Question

I generate a list of one dimensional numpy arrays in a loop and later convert this list to a 2d numpy array. I would\'ve preallocated a 2d numpy array if i knew the number o

Answer 1

Even simpler than @Gill Bates' answer, here is an one line code:

np.stack(list_of_arrays, axis=0)