search
Search
Join our weekly DS/ML newsletter layers DS/ML Guides
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
brightness_medium
share
arrow_backShare
Twitter
Facebook

Python List | sort method

Programming
chevron_right
Python
chevron_right
Operations
chevron_right
List Operations
chevron_right
Documentation
schedule Jul 1, 2022
Last updated
local_offer Python
Tags

Python's list.sort(~) method sorts the elements of a list. The list is sorted in ascending order by default.

NOTE

list.sort(~) changes the order of the list permanently.

Parameters

1. reverse | boolean | optional

If True, the sorted list is reversed (sorted in descending order). Defaults to False.

2. key | function | optional

A function to specify the sorting criteria. The function should take a single argument and return a key to use for sorting purposes. Defaults to None.

Return value

None

Examples

Basic usage

To sort the list animals in ascending order:

animals = ['cat', 'doge', 'bird']
animals.sort()
print(animals)
['bird', 'cat', 'doge']

Note that the list is now sorted with elements in ascending alphabetical order.

Reverse parameter

To sort the list animals in descending order:

animals = ['cat', 'doge', 'bird']
animals.sort(reverse = True)
print(animals)
['doge', 'cat', 'bird']

Note that the list is now sorted with elements in descending alphabetical order.

Key parameter

To sort the list numbers according to the remainder when dividing each element by 3:

# A function that returns the remainder when dividing each element by 3
def modulo_3(elem):
return(elem % 3)
numbers = [5, 3, 4, 2]
# Sort numbers list using modulo_3 function as sorting key
numbers.sort(key = modulo_3)
print(numbers)
[3, 4, 5, 2]

Note that numbers list is now sorted in ascending order according to the remainder when each element is divided by 3.

mail
Join our newsletter for updates on new DS/ML comprehensive guides (spam-free)
robocat
Published by Isshin Inada
Edited by 0 others
Did you find this page useful?
Ask a question or leave a feedback...
Official Python Documentation
https://docs.python.org/3/howto/sorting.html
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!