[Tutor] Inverse range

[Alan Gauld]

> I am playing with Python. Playing as in learning.
> Is it possible to reverse a range sequence? If, for instance, I 
> call:
>
> for f in range( 1,5 ):
> print f
>
> Is it possible to reverse it? As in:
> 4
> 3
> 2
> 1

Yes, there is a normally unused third parameter to range
used to control the step size. It can bew negative so:

range(4,0,-1)

does what you want...

Alan G.