give me only anwser in python

Doubly Linked List Every node has element, next, and prev attributes. DoublyLinked class has: Attributes: header, trailer, and size attributes. Methods: insertBetween (self, e, predec, successor) \& deleteNode(self, node) (3) Write a concatenate (L,M) method for concatenating two doubly linked lists, into a list K, where the list L precedes M in the new one. 1 2 3 4 5 6 7 8 9