What are doubly linked lists in Python?

What are doubly linked lists in Python?

Doubly linked lists are data structures where each node contains a reference to both the next and previous node.

How do I implement a doubly linked list in Python?

You can create a class for the nodes and another for the doubly linked list itself. Would you like a code example?

Yes, please provide a simple implementation.

Here's a basic implementation:

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None
        self.prev = None

class DoublyLinkedList:
    def __init__(self):
        self.head = None

    def append(self, data):
        new_node = Node(data)
        if not self.head:
            self.head = new_node
            return
        last = self.head
        while last.next:
            last = last.next
        last.next = new_node
        new_node.prev = last

What are some common operations I can perform on a doubly linked list?

Common operations include insertion, deletion, traversal, and searching for elements.