Question

So for a list that has 1000 elements, I want to loop from 400 to 500. How do you do it?

I don’t see a way by using the for each and for range techniques.

Answer 1

for x in thousand[400:500]:     pass 

If you are working with an iterable instead of a list, you should use itertools:

import itertools for x in itertools.islice(thousand, 400, 500):     pass 

If you need to loop over thousand[500], then use 501 as the latter index. This will work even if thousand[501] is not a valid index.