Queues can be used to implement job scheduling for an office printer, order processing for e-tickets, or to create algorithms for breadth-first search in graphs. Queues are often mentioned together with Stacks, which is a similar data structure described on the previous page. For Python lists (and arrays), a Queue can look and behave like this:

Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Bootcamp Python Certificate Python Training · ❮ Standard Library Modules · Create a FIFO queue, put an item, then get it back: import queue q = queue.Queue() q.put('task1') print(q.get()) Try it Yourself » ·

February 23, 2026 - Source code: Lib/queue.py The queue module implements multi-producer, multi-consumer queues. It is especially useful in threaded programming when information must be exchanged safely between multip...

In this tutorial, you'll take a deep dive into the theory and practice of queues in programming. Along the way, you'll get to know the different types of queues, implement them, and then learn about the higher-level queues in Python's standard library.

December 11, 2025 - Explanation: popleft() efficiently removes the first element without shifting, making deque ideal for queues. Python’s queue module provides a thread-safe FIFO queue. You can specify a maxsize.

February 22, 2026 - Source code: Lib/asyncio/queues.py asyncio queues are designed to be similar to classes of the queue module. Although asyncio queues are not thread-safe, they are designed to be used specifically i...

July 9, 2025 - Explore object-oriented programming (OOP) in Python by creating a queue class. Learn how to implement methods for adding elements to the queue (enqueue) and removing elements from the queue (dequeue).

Source code: Lib/queue.py · The queue module implements multi-producer, multi-consumer queues. It is especially useful in threaded programming when information must be exchanged safely between multiple threads. The Queue class in this module implements all the required locking semantics.

March 27, 2024 - Python provides a queue module in the standard library that has different queue implementations for programmers to use in their applications.

Now available for Python 3! Buy the book! ... The Queue module provides a FIFO implementation suitable for multi-threaded programming. It can be used to pass messages or other data between producer and consumer threads safely. Locking is handled for the caller, so it is simple to have as many ...

February 26, 2020 - In Python, we can use the queue module to create a queue of objects. This is a part of the standard Python library, so there’s no need to use pip.

It depends on the availability of thread support in Python; see the threading module. Implements three types of queue whose only difference is the order that the entries are retrieved. In a FIFO queue, the first tasks added are the first retrieved. In a LIFO queue, the most recently added entry is the first retrieved (operating like a stack).

May 10, 2001 - File: queue-example-1.py import threading import Queue import time, random WORKERS = 2 class Worker(threading.Thread): def _ _init_ _(self, queue): self._ _queue = queue threading.Thread._ _init_ _(self) def run(self): while 1: item = self._ _queue.get() if item is None: break # reached end of queue # pretend we're doing something that takes 10—100 ms time.sleep(random.randint(10, 100) / 1000.0) print "task", item, "finished" # # try it queue = Queue.Queue(0) for i in range(WORKERS): Worker(queue).start() # start a worker for i in range(10): queue.put(i) for i in range(WORKERS): queue.put(None) # add end-of-queue markers task 1 finished task 0 finished task 3 finished task 2 finished task 4 finished task 5 finished task 7 finished task 6 finished task 9 finished task 8 finished

August 28, 2023 - Again, here we use the append and pop operations of the list to simulate the core operations of a queue. Python has a deque (pronounced 'deck') library that provides a sequence with efficient methods to work as a stack or a queue.

It is again appropriate to create a new class for the implementation of the abstract data type queue. As before, we will use the power and simplicity of the list collection to build the internal representation of the queue · We need to decide which end of the list to use as the rear and which ...

March 5, 2026 - A queue is a built-in module of python used in threaded programming. It stores items sequentially in a FIFO manner. Learn all about the queue in python now!

RQ (Redis Queue) is a simple Python library for queueing jobs and processing them in the background with workers. It is backed by Redis/Valkey and is designed to have a low barrier to entry.

December 1, 2023 - In this tutorial, you'll take a deep dive into the theory and practice of queues in programming. Along the way, you'll get to know the different types of queues, implement them, and then learn about the higher-level queues in Python's standard library. Be prepared to do a lot of coding.

October 14, 2025 - There are Four types of queues in Python. They are: ... In the first-in-first-out queue, the first tasks added are the first retrieved. It is just like putting the element inside an open cylinder. Before we move ahead, we need to import one library called a queue.