Python 3 Pop() Method Tutorial | Remove List Items using pop

By Digamber Rawat Last updated on
I am going to tell you, how you can remove list items using Python list pop() built-in method. The list pop() function is instrumental when it comes to removing the specific items from the list in Python. As we know, Python is the most popular programming language nowadays. It offers plenty of built-in methods to sort out day to day programming tasks. Today we are going to talk about one of the essential methods in Python, which is known as pop().

To delete any particular item from the data collection we use the pop() method, we pass the item index as an argument in pop() method, and it removes the item and returns the object.

Python List pop() Method Syntax

Check out the pop() method syntax below:

list.pop([index])
Property Detail
index It’s an optional value and this is the item’s index number from the list to be removed. If you don’t pass the index number of the item then the last element from the list will be removed.
users = ["john", "lisa", "maria", "ava"]
removeElement = users.pop(1)
print(removeElement)

# output = lisa

As you see in the example, we declared the list of users in an array form and added some users in it. Then declared the pop() method and passed the index number of the user and saved in the removeElement variable and lastly, we are printing the result.

We need to understand a few things regarding the list pop method in Python. The pop method starts the calculation from the 0th index not from the 1st in case if you are willing to remove the 2nd item from the list then you have to supply the 1 index number to the list pop() function in Python.

The Non Existing Index in Pop() Method Example

In this example i will show what happens when you pass the non-existing index in the list pop() method.

users = ["john", "lisa", "maria", "randy", "ali"]
removeElement = users.pop(6)
print(removeElement)

Check out the output below:

Traceback (most recent call last):
  File "main.py", line 2, in <module>
    removeElement = users.pop(6)
IndexError: pop index out of range

When you supply non-existing index in the pop method in this condition, it will throw IndexError: pop index out of range exception.

The Negative Index Number pop() Method Example

In this example, we will check out what will happen if we supply negative index (-1) in pop() method.

numList = [9, 13, 31, 20, 33, 44]
print('Original list: ', numList)
remove_item = numList.pop(-1)
 
print('New list after negative index = -1: ', numList)
print('The item removed: ', remove_item)

Following will be the output for above programme:

Original list:  [9, 13, 31, 20, 33, 44]
New list after negative index = -1:  [9, 13, 31, 20, 33]

The item removed:  44

Now as you can see in the python programme we have passed the -1 index as an argument in the given above programme. The default value for the pop() method is -1 and it returned the last element from the list.

Finally we are done with Python list pop method tutorial, if you liked this tutorial then don’t forget to share it with other.

Digamber Rawat
Digamber Rawat

Full stack developer with a passion for UI/UX design. I create beautiful and useful digital products to solve people’s problem and make their life easy.

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