The following results seem inconsistent to me (numpy 1.9.2):

>>> a = np.arange(8).reshape((2,2,2))
>>> a[ [[0], [0]] ]
array([[0, 1]])
>>> a[ np.array([[0], [0]]) ]
array([[[[0, 1],
         [2, 3]]],
       [[[0, 1],
         [2, 3]]]])

I've briefly looked at the indexing manual (http://docs.scipy.org/doc/numpy/reference/arrays.indexing.html) and nothing seems to account for this.

Thanks,
Lluis