spliting a list by nth items

[Steven Bethard]

Larry Bates <lbates <at> swamisoft.com> writes:
> 
> I believe you meant somthing like:
> 
> non_nth_items = [items[i-1] for i in range(1,len(items)-1) if i % n]

Yeah, the items list is not of the form range(x) -- in fact, my current use 
for this is with a list of filenames -- so Michael Hoffman's solution:

> > non_nth_items = [x for x in items if x % n]

wouldn't work.  In the full fledged problem, I actually have a start parameter 
for the slice as well as the step parameter (n), so I could probably do 
something along these lines (inspired by your two suggestions):

non_nth_items = [item for i, item in enumerate(items) if (i - start) % n]

instead of my original

non_nth_items = list(items)
del non_nth_items[start::n]

The enumerate/range solution is a little more verbose, but it does only go 
through the list once.  Thanks for the good suggestions!

STeve