bit shifting question

[David Eppstein]

In article <40a92d88$1 at nntp0.pdx.net>,
 Scott David Daniels <Scott.Daniels at Acm.Org> wrote:

> Unfortunately, shifting is one of those places you
> can still discover the "width"  with code like:
> 
>      def wordwidth():
>          for shift in range(256):
>              if 1 << shift < 0:
>                  return 1 + shift

Of course this will give a warning in 2.3 and fail to work in 2.4...
I wish I could get the 2.4 behavior now with a from __future__ import 
but I don't see one for this, instead I find myself doing 1L<<shift a 
lot.

-- 
David Eppstein                      http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science