![]() ![]() We can perform the following operations in the Queue. ![]() The operating system manages the queue for processing the various processes within a computer. If we are the last in line, we need to wait until all other tasks are completed that ahead of ours. The students want to print their paper the printer will print the first task and second, so on. The next element is inserted from the rear end and removed from the front end.įor example - There are 20 computers in the computer science lab and connected to a single printer. The queue has the two ends front and rear. It is also known as "first come first severed". The concept of queue is based on the FIFO, which means " First in First Out". What is the Queue?Ī queue is a linear type of data structure used to store the data in a sequentially. In this tutorial, we will discuss the Queue's basic concepts and built-in Queue class and implement it using the Python code. NOTE: We can also use the dequeue library to implement Queue in python and we can also use arrays.Python Tutorial Python Features Python History Python Applications Python Install Python Example Python Variables Python Data Types Python Keywords Python Literals Python Operators Python Comments Python If else Python Loops Python For Loop Python While Loop Python Break Python Continue Python Pass Python Strings Python Lists Python Tuples Python List Vs Tuple Python Sets Python Dictionary Python Functions Python Built-in Functions Python Lambda Functions Python Files I/O Python Modules Python Exceptions Python Date Python Regex Python Sending Email Read CSV File Write CSV File Read Excel File Write Excel File Python Assert Python List Comprehension Python Collection Module Python Math Module Python OS Module Python Random Module Python Statistics Module Python Sys Module Python IDEs Python Arrays Command Line Arguments Python Magic Method Python Stack & Queue PySpark MLlib Python Decorator Python Generators Web Scraping Using Python Python JSON Python Itertools Python Multiprocessing How to Calculate Distance between Two Points using GEOPY Gmail API in Python How to Plot the Google Map using folium package in Python Grid Search in Python Python High Order Function nsetools in Python Python program to find the nth Fibonacci Number Python OpenCV object detection Python SimpleImputer module Second Largest Number in Python 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. IsEmpty: To return True if the queue is empty, else return False. 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 learn more about how a queue works, chekout: Queue Data Structure 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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