python numpy split array в неравные подмассивы

 def split_padded(a,n): padding = (-len(a))%n return np.split(np.concatenate((a,np.zeros(padding))),n) 

Вы ищете np.array_split? Вот докшлина:

 Split an array into multiple sub-arrays. Please refer to the ``split`` documentation. The only difference between these functions is that ``array_split`` allows `indices_or_sections` to be an integer that does *not* equally divide the axis. See Also -------- split : Split array into multiple sub-arrays of equal size. Examples -------- >>> x = np.arange(8.0) >>> np.array_split(x, 3) [array([ 0., 1., 2.]), array([ 3., 4., 5.]), array([ 6., 7.])] 

http://docs.scipy.org/doc/numpy-1.10.0/reference/generated/numpy.array_split.html