The module provides a class called deque, which allows you to create a double-ended queue of any length. # The queue now contains only one element (3)ĭouble-ended queue, also known as deque, can be implemented in Python using the collections module. # Remove elements from the front of the queue In this approach, we can use a list to represent the queue and use its built-in methods such as append() to add elements to the back of the queue and pop() to remove elements from the front of the queue.

Implementing a queue using a list in Python is fairly simple. Now you can use this Queue in the following way: In Python, a queue can be implemented using a class with methods for enqueue, dequeue, size, and isEmpty. There are two common ways to implement a queue: using a list or using the queue class from the built-in queue module. Print('Processing task:', task, 'with priority:', priority) # Add tasks to the priority queue with their priority My_priority_queue = queue.PriorityQueue() Python’s queue module provides an implementation of the Priority Queue data structure. The element with the highest priority is dequeued first, followed by the element with the second highest priority, and so on. # The two items are removed from the queueĪ Priority Queue is a special type of queue where each element has a priority assigned to it, and the elements are dequeued in order of their priority. # The oldest item is removed from the queue You can dequeue elements using the front pointer and enqueue elements using the rear pointer in a circular queue. In a circular queue, there are two pointers, front and rear. This type of queue is useful when we want to store data in a circular manner and treat the data structure as a circular list. In other words, a circular queue wraps around and reuses the space that the first element took up after the last element. Print(my_deque) # deque()Ĭircular Queue is a type of queue in which the last element is connected to the first element to make a circular data structure. # Remove a item from the back of the deque # Remove a item from the front of the deque # Add a new item to the back of the deque # Add a new item to the front of the deque

Typically, they implement them as a simple linear data structure, where they add elements to the back of the queue and remove them from the front of the queue. Programmers often use queues to manage various types of data, such as events, messages, or tasks. We store the elements in such a way to ensure this behavior. The first element added to the queue is the first element to be removed from the queue, known as the First In First Out (FIFO) principle. Queue Data Structure in PythonĪ queue is a data structure in Python that allows the ordered processing of data.

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