more fun with PEP 276

[David Eppstein]

In article <mailman.1007424313.28420.python-list at python.org>,
 James_Althoff at i2.com wrote:

> Let's start with Greg Ewing's recent suggestion of writing for-loops as:
> 
>     for -5 <= i <= 5:
>         print i
> 
> The nice thing about the above is the apparent clarity of intent.  And the
> fact that all combinations of open and closed intervals are handled nicely.
> On the down side we observe that this construct requires new syntax, that
> it doesn't work outside of the context of a for-loop (in fact, it is a
> relational expression outside the context of a for-loop), and that there is
> no apparent mechanism for having a step size other than 1 (or -1).

But there isn't a huge distinction between "works only in a for loop" and 
"produces general-purpose iterators" because of list comprehensions:
    L = [i for -5 <= i <= 5]
-- 
David Eppstein       UC Irvine Dept. of Information & Computer Science
eppstein at ics.uci.edu http://www.ics.uci.edu/~eppstein/