Mar 6, 2025 · A deque stands for Double-Ended Queue. It is a data structure that allows adding and removing elements from both ends efficiently. Unlike regular queues, which are typically operated on using FIFO (First In, First Out) principles, a deque supports both FIFO and LIFO (Last In, First Out) operations.

Feb 13, 2025 · Deque in Python is implemented using a doubly linked list, making append and pop operations from both ends O(1) (constant time). Unlike Python’s built-in list (which uses a dynamic array), deque does not require shifting elements when inserting/deleting at the front.

Python’s collections module provides a class called deque that’s specially designed to provide fast and memory-efficient ways to append and pop item from both ends of the underlying data structure.

Feb 12, 2025 · While Python provides a built-in collections.deque for optimized performance, a deque can also be implemented using lists. 1. Insertion at Rear (insertRear(x)): Adds an item at the rear of Deque. Checks if deque is full. Calculates the new rear index using (front + size) % cap. Inserts the element at the computed rear index.

Apr 20, 2025 · In Python, the collections.deque class provides an efficient way to handle data as a queue, stack, or deque (double-ended queue). While the built-in list can be used as a queue, stack, or deque, collections.deque offers better performance, especially for adding or removing elements at the beginning.

Python's collections module provides a powerful data structure called deque (pronounced "deck"), which stands for "double-ended queue." A deque is a generalization of stacks and queues, allowing you to add or remove elements from both ends efficiently.

In Python, the collections.deque (double-ended queue) is a powerful data structure optimized for fast insertions and deletions from both ends. Unlike Python lists, which have an O (n) time complexity for insertions and deletions at the beginning, deque performs these operations in …

Mar 17, 2025 · In Python, the deque (double - ended queue) is a powerful data structure provided by the collections module. It offers a convenient way to work with data that needs to be accessed and modified from both ends efficiently.

deque (double-ended queue) in Python, from the collections module, provides optimized operations for appending and popping elements from both ends of the sequence.

Jan 18, 2024 · my_deque = deque() # Create a `deque`. my_deque.append(1) # Append an element to its end. my_deque.extend(range(2, 5)) # Extend the `deque` with more elements. popped_from_deque = my_deque.pop() # Pop an element from the end. There are two main differences between deque s and lists: