Data Structures, Algorithms, Data Engineering, Data Science, Doubly Linked List.
current.next if current.next: current.next.prev = current.prev if current == self.head: self.head = current.next if current == self.tail: self.tail = current.prev else: current = self.head while current and current.data != key: current = current.next if current: if current.prev: current.prev.next =