Pythonic way to find maximum value and its index in a list?

If I want the maximum value in a list, I can just write max(List), but what if I also need the index of the maximum value?

I can write something like this:

maximum=0
for i,value in enumerate(List):
    if value>maximum:
        maximum=value
        index=i

But it looks tedious to me.

And if I write:

List.index(max(List))

Then it will iterate the list twice.

Is there a better way?