Subclassing int for a revolving control number

[Christopher T King]

On Tue, 20 Jul 2004, Calvin Spealman wrote:

> Personally, rather than all these suggestions of python-written classes or
> of itertools.cycle, I would like a C-extension module with something like
> this. All it would have to be is an actually C int value with no bounds
> checking. This would be usually for working with low-level data, like
> bitmaps or compressed data, where you can't have longs and where you need
> good performance on simple arithmetic.

numarray does this:

>>> from numarray import *
>>> array(254,UInt8)+4
2

It also greatly speeds up performance on the vector operations needed in 
processing bitmaps, etc.