[Tutor] String slicing from tuple list

[cgw501@york.ac.uk]

Hi,

I have a list of tuples like this:

[(1423, 2637),(6457, 8345),(9086, 10100),(12304, 15666)]

Each tuple references coordinates of a big long string and they are in the 
'right' order, i.e. earliest coordinate first within each tuple, and 
eearliest tuple first in the list. What I want to do is use this list of 
coordinates to retrieve the parts of the string *between* each tuple. So in 
my example I would want the slices [2367:6457], [8345:9086] and 
[10100:12304]. Hope this is clear.

I'm coming up short of ideas of how to achieve this. I guess a for loop, 
but I'm not sure how I can index *the next item* in the list, if that makes 
sense, or perhaps there is another way.

Any help, as ever, appreciated.

Chris