Linked Lists- Nth-to-Last Node

inserting an Image

Code:

Method 1:

    def print_nth_from_last(self, n):

            total_length = self.length_iterative()

            current = self.head 
            while current:
                if total_length == n:
                    print(current.data)

                    return current

                total_length -= 1
                current = current.next
            if current is None:
               return

Method 2:

    def print_nth_from_last(self, n):


            p = self.head
            q = self.head

            count = 0
            while q and count < n:

                q = q.next
                count += 1

            if not q:

                print(str(n) + " is greater than the number of nodes in list.")
                return

            while p and q:

                p = p.next
                q = q.next

            return p.data