List in python is a data structure. It is mutable or changable and is an ordered sequence of elements. Each element or value inside the list is an element and each element has a unique index. You can access the element of the list using the index values.
In this entire post, you will know the various examples of lists and their application.
The python list.index() provides you to find the index of the element in a list. Just pass the element you want to search the index() method will return the index.
Suppose you have two lists and want to find the union of the two lists. You can use extend, collections, and other methods for union operation. Read the below post to know more in detail.
Sometimes there are duplicates element in the list. You can count the occurrence of them in the list.