Using Python to Check if Queue is Empty

Using Python to check if a queue is empty is easy.

If you are using deque from the collections module, you can use the len() function to get the size of your queue and check if the size is equal to 0.

from collections import deque

q = deque()

if len(q) == 0:
    print("q is empty")

#Output:
q is empty

If you are using Queue from the queue module, you should use the qsize() function to get the number of items in your queue and check if that number is equal to 0.

from queue import Queue

q = Queue()

if q.qsize() == 0:
    print("q is empty")

#Output:
q is empty

Queues are data structures which are simple, yet powerful, and can make our programming life easier depending on the requirements for our code.

When working with queues in Python, it can be valuable to be able check if a queue is empty.

A queue is empty if it has no elements in it.

There are a few different ways you can implement queues in Python. The collections module has deque which allows you to create a queue in your code. You can also use the queue module to create a queue.

Depending on which queue implementation you use, the way to check if a queue is empty will be slightly different.

How to Check if Queue is Empty in Python

If you are using deque from the collections module, you can use the len() function to get the size of your queue and check if the size is equal to 0.

Below shows you a simple example of how to check if a queue is empty in Python using the collections module.

from collections import deque

q = deque()

if len(q) == 0:
    print("q is empty")

#Output:
q is empty

If you are using Queue from the queue module, you should use the qsize() function to get the number of items in your queue and check if that number is equal to 0.

Below shows you a simple example of how to check if a queue is empty in Python using the queue module.

from queue import Queue

q = Queue()

if q.qsize() == 0:
    print("q is empty")

#Output:
q is empty

Hopefully this article has been useful for you to learn how to check if a queue is empty in Python.