pop()

- [Instructor] The second method we can work on…is our Pop Method.…And this is the method that's going to allow us…to remove an item from the top of the stack.…Now, we know already that the list data type…has a built in Pop Method.…So, we're just going to make use of that.…So, we will return whatever value…is given to us by self.items.pop.…Now, we don't have to specify an index here,…because we always are going to be wanting it…to return us the last item from the list.…

That's how the Pop Method works.…If you don't give it any parameters,…it will always return the last method.…That's pretty much it.…Let's add another doc string, as we did for Push.…So, what does this method do?…This method…returns the last item.…We should say, removes and returns the last item…from the list,…which is also…the top item of the stack.…

And just as we did before, we should talk about…the run time here, as well.…And the run time is also constant time,…just as it was for Push.…Because really, all we're doing is, we are indexing…to that last item in the list and then returning it.…