Web Reference: Dec 11, 2025 · A deque stands for Double-Ended Queue. It is a special type of data structure that allows you to add and remove elements from both ends efficiently. This makes it useful in applications like task scheduling, sliding window problems and real-time data processing. Jan 12, 2026 · In this tutorial, you’ll learn how deque works, when to use it over a list, and how to apply it in real code. By the end of this tutorial, you’ll understand that: deque internally uses a doubly linked list, so end operations are O (1) while random indexing is O (n). Jul 9, 2023 · Learn about Python Deque, a versatile data structure known as a Doubly Ended Queue. Explore its functionality, implementation, and practical applications.
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