python3: 'where' keyword

[Paul Rubin]

"Carl Banks" <invalidemail at aerojockey.com> writes:
> >    # compute sqrt(2) + sqrt(3)
> >    x = (sqrt(a) where:
> >          a = 2.) \
> >        + sqrt (a) where:
> >            a = 3.
> >
> > Hmmm.
> 
> What would be the advantage of that over this?
> 
> . x = sqrt(a) + sqrt(b) where:
> .     a = 2.0
> .     b = 3.0

The idea of "where" is to allow re-using variable names instead of
having to keep track of which ones are in use.  I just tried to give a
very simple example of how you might do that more than once in a
statement.