Python enumerate reverse index only

Question

I am trying to reverse the index given by enumerate whilst retaining the original order of the list being enumerated.

Assume I have the following:

Answer 1

Actually I'm using the same logic as @RemcoGerlich did, but I use list comprehension directly, which make the code now become 1-liner:

def generatelist(x):
    return [(x-1-i,n) for i,n in enumerate(range(x))]

Regarding the dilemma of choosing generator or list comprehension, here is the suggested way:

Basically, use a generator expression if all you're doing is iterating once. If you want to store and use the generated results, then you're probably better off with a list comprehension.