Difference Between queue.queue Vs collections.deque In Python

Both Queue and Deque are present in the built-in modules Queue and Collections in Python, both of them are widely used data structures, but they are used for different purposes. Although both are different and used for very different purposes, they are in a way linked to each other in terms of complete functionality. In this article ,we will discuss the difference between both on the basis of usability, execution time, working, implementation, etc. in Python.

queue.Queue

Queue is present in the queue module in Python which works on the FIFO (First in First out) property. As the name suggests in Queue, the element inserted at first will be removed first. It is used to implement multi-producer, multi-consumer queues and it is very useful in threaded programming when we have to exchange the information safely between multiple threads. The Queue class in this module implements all the required locking semantics and it depends on the thread support’s availability in Python.

Implementation of queue.Queue

import queue

q = queue.Queue(maxsize=3)

print(q.qsize())

q.put(12)
q.put(24)
q.put(36)

print("Full: ", q.full())

print("Size: ", q.qsize())

print(q.get())
print(q.get())
print(q.get())

print("Empty: ", q.empty())

collections.deque

Deque ( Doubly Ended Queue ) is present in the collections module in Python. In this data structure, insertion and deletion can be done on the both rear and front end. Operations of deque are quite faster than list in Python.

Implementation of collections.deque

import collections

Deque = collections.deque([12, 24, 36])

Deque.append(0)

print("The deque after appending at right is:", Deque)

Deque.appendleft(100)

print("The deque after appending at left is: ", Deque)

Deque.pop()

print("The deque after deleting from right is:", Deque);

Deque.popleft()

print("Queue:", Deque)

Sr. No.QueueDeque
1It implements a simple
queue data structure.
It implements a doubly ended
queue data structure.
2It is present in the
queue modules in Python.
It is present in the
collections module in Python.
3It has fewer features
(operations and methods).
It has more features
(operation and methods).
4It follows FIFO
(First in First out).
Insertion and deletion of
an element can be done on the
both rear and front end.
5The operations of Queue
are slow (long execution time).
The operations of
deque are fast (very low execution time).
6It is used in file IO,
CPU scheduling and
Disk scheduling.
It is mostly used
for data structure operations.

So, in this blog, we have tried to explain Difference Between queue.queue Vs collections.deque In Python. If you want to strengthen your basic data structures knowledge feel free to check Foundation Courses at Prepbytes.

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