How to Use Priority Queue in Python

PriorityQueue is a type of queue that comes with priorities, and its usage is as follows:

1. Import the PriorityQueue class: First, you need to import the PriorityQueue class by using the following statement:
2. import the PriorityQueue class from the module queue
3. Instantiate a PriorityQueue object: Create a PriorityQueue object using the PriorityQueue class.
4. Create a priority queue with the variable name pq.
5. Adding elements: Use the put() method to add elements to the PriorityQueue, where the priority of the elements can be any type of value, such as integers, float numbers, strings, etc.
6. Insert the numbers 3, 1, and 5 to the priority queue.
7. Accessing elements: By using the get() method to retrieve elements from a PriorityQueue, the highest priority element will be returned.
8. retrieve an element using pq.
9. Check if the PriorityQueue is empty: Using the empty() method, determine if the PriorityQueue is empty. If it is empty, return True; otherwise, return False.
10. if the priority queue is empty, print “PriorityQueue is empty”
11. To get the size of the PriorityQueue: use the qsize() method to get the number of elements in the PriorityQueue.
12. The size is equal to the queue’s current size.

It is important to note that PriorityQueue is a thread-safe queue, suitable for use in a multi-threaded environment. To use it in a multi-threaded environment, you can import the thread-safe PriorityQueue class with the following statement.

from queue import PriorityQueue as ThreadSafePriorityQueue