How to Check if an Item Exists in List Using Python?

Is there a way which used to check if an item exists in the list in Python? Of course, what would be that if something already available in the list? In this post, I am going to describe that how to exactly do it?

There are about two to three ways that may help. In the first step, you will know by using operator, the second way need to use count() function, and in the third, we will use custom logic how to actually do it?

How to Check if an Item Exists in List Using Python? 3 Ways

First of all, did you already make any list yourself in Python? See out the sample, for example how to make a list in Python?

wholeblog = ['Hello' , 'What's Up', 'WholeBlog', 'TheWholeBlog', 'What', 'Done']

You can make list like the above example and also use in replace of ‘ ‘ = “, like

wholeblog = ["Hello", "What's Up", "WholeBlogs", "TheWholeBlog"]

Check if a value exists in the list using the operator

if 'hello' in wholeblog:
     print("Yes, 'hello' found in List : " , wholeblog)

Check if a value exists in the list using count()

As described already that you will come to know also by using the count() build-in function in Python.

if wholeblog.count('hello') > 0 :

     print("Yes, 'hello' found in List : " , wholeblog)

That’s it.

Check if a value exists in the list using logic

result = any(len(elem) == 5 for elem in wholeblog)

if result:

    print("Yes, string element with size 5 found")

In the above example, you will come to know how to find out length also using custom logic.

Are you getting errors while installing difflib? follow up: How To Install difflib in Python Using CMD? this guide will help and resolve your errors whatever you are facing.