Data Structures, Algorithms, Data Engineering, Data Science, Doubly Linked List.
the beginning, end, or on a specific value. def delete(self, key=None, index=None): if not self.head: return if index is not None: current = self.head count = 0 while current and count < index: count += 1 current = current.next if not current: return if current.prev: current.prev.next =