Message 80643 - Python tracker

I've looked again at what it would take to update the C code and think
that the optimizations there make it difficult to add this feature
without adding a lot of code complexity and without slowing-down the
common case.  Also, I value the simplicity of the current API.

Suggest you use "range(start, sys.maxsize, step)" or just roll your own
generator (like Lambert's second version).