On Wed, Feb 18, 2009 at 01:02:54PM +0000, Neal Becker wrote: > > B has a reference to A. > Could you be more specific? Where is this reference stored? In [1]: import numpy as np In [2]: a = np.empty(10) In [3]: b = a[::2] In [4]: b.base is a Out[4]: True Gaël