NOTE: We can also use the dequeue library to implement Queue in python and we can also use arrays. We will be using Python List for implementing queue data structure. Size: To check the size of the queue, in other words, count the number of elements in the queue and return it. Implementation using the que class Implementation using the queue module. The queue.Queue implementation in the Python standard library is synchronized and provides locking semantics to support multiple concurrent producers and consumers. These include: Implementation using a list. IsEmpty: To return True if the queue is empty, else return False. Implementing the Python queue data structure There are various ways that we can use to implement the queue data structure. Also, you will find implementation of circular queue in C, C++, Java and Python. In the above example, the get() method is used to remove the element from. Courses Tutorials Examples Circular Queue Data Structure In this tutorial, you will learn what a circular queue is. Hence, to create a simple queue data structure, we need to provide it with the following functions:Įnqueue: To add a new data element at the rear of the queue.ĭequeue: To remove an element from the front of the queue. To implement the FIFO queue, we are required to import the queue() module in Python. We will be using Python List for implementing the circular queue data structure. If No, then add the new data element to the location of tail pointer and increment the tail pointer. To learn more about how a queue works, chekout: Queue Data Structure Initialize the queue, with size of the queue defined ( maxSize ), and head and tail pointers. When it is required to implement a queue using Python, a queue class is created, and methods to add and delete elements are defined. And elements are removed from the front, which is called Dequeue. In a queue, a new element is added from the rear, and existing elements are removed from the front.Īs you can see in the diagram above, new elements are added from the back, and this function of adding a new element to the queue is called Enqueue. Queue is a simple data structure that works on the simple principle of "First in First out" just like an ordinary queue at a coffee shop or ticket counters etc, where the first one to enter the queue gets served first.
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