search
Search
Publish
menu
menu search toc more_vert
Robocat
Guest 0reps
Thanks for the thanks!
close
Comments
Log in or sign up
Cancel
Post
account_circle
Profile
exit_to_app
Sign out
help Ask a question
Share on Twitter
search
keyboard_voice
close
Searching Tips
Search for a recipe: "Creating a table in MySQL"
Search for an API documentation: "@append"
Search for code: "!dataframe"
Apply a tag filter: "#python"
Useful Shortcuts
/ to open search panel
Esc to close search panel
to navigate between search results
d to clear all current filters
Enter to expand content preview
icon_star
Doc Search
icon_star
Code Search Beta
SORRY NOTHING FOUND!
mic
Start speaking...
Voice search is only supported in Safari and Chrome.
Navigate to
A
A
share
thumb_up_alt
bookmark
arrow_backShare
Twitter
Facebook

Adding items to a list in Python

Programming
chevron_right
Python
chevron_right
Operations
chevron_right
List Operations
chevron_right
Cookbooks
schedule Mar 9, 2022
Last updated
local_offer Python
Tags

In Python, we can leverage list methods list.append(~), list.extend(~) and list.insert(~) to add items to a list.

Separate from list methods, we can also use + operator to combine lists, or use slicing to insert items at specific positions.

In summary:

Description

Method

Add an item to the end of a list

append(~)

Combine lists

extend(~), + operator

Add an item at a specified index

insert(~), slicing

Adding item to the end of a list

To add an item to the end of a list:

colors = ['red', 'blue']
colors.append('green')
print(colors)
['red', 'blue', 'green']

Combining lists

To combine one list with another using list.extend(~) method:

sports = ['Basketball', 'Football', 'Tennis']
winter_sports = ['Skiing','Snowboarding']

sports.extend(winter_sports)

print(sports)
['Basketball', 'Football', 'Tennis', 'Skiing', 'Snowboarding']

To combine lists using the + operator:

sports = ['Basketball', 'Football', 'Tennis']
winter_sports = ['Skiing', 'Snowboarding']

new_list = sports + winter_sports
print(new_list)
['Basketball', 'Football', 'Tennis', 'Skiing', 'Snowboarding']

Adding an item at a specified index

To insert an item at a specified index in a list using list.insert(~):

fruits = ['apple', 'pear', 'orange']

# Insert 'banana' at index position 1
fruits.insert(1, 'banana')
print(fruits)
['apple', 'banana', 'pear', 'orange']

We can see that 'banana' was inserted before 'pear' which previously occupied index position 1.

To insert an item at a specified index using slicing:

fruits = ['apple', 'pear', 'orange']

fruits[1:1] = ['banana']
print(fruits)
['apple', 'banana', 'pear', 'orange']
robocat
Published by Isshin Inada
Edited by 0 others
Did you find this page useful?
thumb_up
thumb_down
Ask a question or leave a feedback...