Simple question, in Matlab you can do ragged arrays using "cell arrays." Is the equivalent thing in scipy/numpy/python just a List of arrays? I made one here: In [55]:a Out[55]: [array([0, 0, 0, 0, 0]), array([0, 0, 0, 0, 0, 0]), array([0, 0, 0, 0]), array([1, 1, 1, 1])]