The bigndarray class is going to disappear (probably in the next release of NumPy). It was a stop-gap measure as the future of 64-bit fixes in Python was unclear. Python 2.5 will have removed the 64-bit limitations that led to the bigndarray and so it will be removed. I have been thinking, however, of replacing it with a super-class that does not define the dimensions or strides. In other words, the default array would be just a block of memory. The standard array would inherit from the default and add dimension and strides pointers. I was thinking that this might make it easier for sub-classes using fixed-sized dimensions and strides. I'm not sure if that would actually be useful, but since I was thinking about the disappearance of the bigndarray, I thought I would ask for comments. -Travis