List Remove Method in Python

Python Tutorials

From this tutorial, you will be learning about Python list Remove method. You will see how to use it on sequences with the help of examples.

Note: The syntax used in the below section is for Python 3. You can change it to any other versions of Python.

Python List Remove

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List Remove Method

The Remove Module is a built-in list method that allows you to delete values in a list.

It deletes the first occurrence of a value in a sequence, i.e., it won’t erase all the instances if exist in the list.

The remove() method has the following syntax:

List_name.remove(<element_value>)

It takes the element_value as an input argument. The function searches the list for the matching element_value and removes the first occurrence of the element_value from the list.

It doesn’t have a return value. It only removes the element from a list without returning a value.

How does the Remove() function work?

When we pass an input value to the remove(), the list gets iterated through each element until the matching one gets found.

This matching element gets removed from the list, and the indexes of all items of the list get also updated. If an invalid or non-existent element provided as input, then the function raises a ValueError exception.

The flowchart below attempts to explain it in a diagram:

Python List Remove Method Flowchart

Program Examples

Removing an element from a list

List = [1,3,2,4,6]

List.remove(3)

print (List)

The result is as follows:

[1, 2, 4, 6]

Removing a tuple from the list

List = [1,2,(4,6),(25,4)]

List.remove((4,6))

print (List)

The output is as follows:

[1, 2, (25, 4)]

Delete a string from the list

List = ["Unix", "PHP", "Golang"]

List.remove("PHP")

print (List)

The result is as follows:

['Unix', 'Golang']

Removing duplicate elements in a list

Social_Media = ["Whatsapp", "Hike", "Facebook", "Whatsapp", "Telegram"]

Social_Media.remove("Whatsapp")

print (Social_Media)

The result is as follows:

['Hike', 'Facebook', 'Whatsapp', 'Telegram']

Errors upon removing invalid items

List = [1,2, "Linux", "Java", 25, 4, 9]

List.remove("PHP")

print (List)

The result is as follows:

Traceback (most recent call last):
File "C:\Python\Python35\test.py", line 3, in <module>
List.remove("PHP")
ValueError: list.remove(x): x not in list

Best,

TechBeamers

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