Python "why" questions

[Roy Smith]

In article <i4b770$hve$1 at localhost.localdomain>,
 Martin Gregorie <martin at address-in-sig.invalid> wrote:

> Say you have intensity data captured from an X-ray goniometer from 160 
> degrees to 30 degrees at 0.01 degree resolution. Which is most evil of 
> the following?
> 
> 1) real intensity[16000:3000]
>    for i from lwb intensity to upb intensity
>       plot(i/100, intensity[i]);

How about (totally inventing syntax as I go along):

5) real intensity[160.0 : 30.0 : 0.01]
   for index, value in intensity:
       plot(index, value)