{"id":67120,"date":"2022-05-05T10:45:59","date_gmt":"2022-05-05T05:15:59","guid":{"rendered":"https:\/\/www.mygreatlearning.com\/blog\/python-queue\/"},"modified":"2024-10-14T23:55:47","modified_gmt":"2024-10-14T18:25:47","slug":"python-queue","status":"publish","type":"post","link":"https:\/\/www.mygreatlearning.com\/blog\/python-queue\/","title":{"rendered":"Python Queue"},"content":{"rendered":"\n

Introduction<\/strong><\/h2>\n\n\n\n

A queue is a type of data structure<\/a> that holds data in a First in First Out manner. Queue follows a specific order for the operations to be performed on the data. The queue is widely implemented as a waiting list for single shared resources or devices such as Printers, CPU, Disk, etc. There are different types of queues like a simple queue, priority queue<\/a>, circular queue, and deque or double-ended queue. All these types of queues are used for different scenarios. Queues are very useful for example, if we need a process to be executed one after other automatically in an order i.e. just like a list. It will process the tasks in a manner called \u201cFirst In First Out\u201d which means the first process or task in the queue will be executed and removed first, after that other processes will be started. A queue can be implemented in programming languages such as Python<\/a>, Java, C++<\/a>, etc. Here are going to discuss its implementation in Python Programming Language.<\/p>\n\n\n\n

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What is a Queue in Python?<\/strong><\/h2>\n\n\n\n

As we just discussed what is a queue. It is the same in Python and works on the same methodology \u201cFirst in First Out\u201d (FIFO). A queue has two ends such as the front end and rear end. The items that can be inserted from is the rear end and the items that are removed from the queue are from the Front end. Therefore, the item that is inserted first in the queue will be the first item that will be removed from the queue and it satisfies the FIFO methodology. <\/p>\n\n\n\n

How does Python Queue work?<\/strong><\/h2>\n\n\n\n

Python queue can be easily implemented to work with real-world problems. For better understanding, it can be compared with a line of people waiting for their number to purchase tickets from the ticket counter. The first person who entered the line will get the tickets first and after that, he will be removed from the line, followed by the next person in the lane and so on. A similar logic will be applied in Python Queue too for programs and processes to be executed. <\/p>\n\n\n\n

Let us see the below diagram to better understand the ends of the Queue:<\/p>\n\n\n\n

1<\/td>2<\/td>3<\/td>4<\/td>5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

In the above queue, the first element 1 is representing the Front end of the queue and the last element 5 is representing the end of the queue that will be processed at last. The insertion will take place after the last element i.e. 5 and the removal of elements will take place from the start of the list i.e. 1.<\/p>\n\n\n\n

Types of the queue in Python<\/strong><\/h2>\n\n\n\n

As we just discussed in the introduction that there are 4 types of the queue in the data structure. But, In Python, there are mainly two types of queues that are discussed below:<\/p>\n\n\n\n