python priority queue customized comparator

This data structure can be used to implement priority queue algorithms and maintainers. CustomComparator is a custom Comparator for DataType or a parent class of DataType. 1 Let's say, for example, that we have the following data that I want to insert to a priority queue: (0, 3, 5) (1, 2, 7) and I want to sort my priority queue by the second argument and then by the third. It generalizes the singly linked list to allow for multiple elements with different access times. Comparator allows to use custom logic to determine order of the elements which is equivalent to priority of the elements. The PriorityQueue, or heapq module in Python, is a data structure for dynamic priority queues with O (1) lookup time. comparator (optional) : Comparator decides the ordering of elements.

The elements of a priority queue are ordered based on the natural sorting ordering of the elements (as determined by their compareTo () method), or by a Comparator provided at the time of creation of the priority queue instance. Comparator allows to use custom logic to determine order of the elements which is equivalent to priority of the elements. In a priority queue, the element with the highest priority is always at the front of the queue and becomes head of the queue and the one to be removed first. The riorityQueue class in Java is an implementation of the Queue interface and It is used to store a collection of elements in a queue and the elements are ordered based on their natural sorting ordering or according to the ordering specified by using custom comparator.

In this tutorial, we will learn about what is, how it is different from other Queue's and use cases of it along with working examples.

Python priority queue customized comparator