How do I move the last item in a list to the front in python?

Question

I searched thoroughly but can't find anything relating to this exact specific. I have a list:

a = [two, three, one] 

I want to move one to the front, so it becomes:

a = [one, two, three] 

The thing is, it could be ANY amount of numbers in the list. Assume there is no way of knowing whether there will be 50 items or 3.

Answer 1

Basically:

a.insert(0, a.pop()) 

Consider using collections.deque if you're doing that often, though.