search
Search
Login
Map of Data Science
menu
menu
search toc
Thanks for the thanks!
close
Comments
Log in or sign up
Cancel
Post
account_circle
Profile
exit_to_app
Sign out
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
Doc Search
Code Search Beta
SORRY NOTHING FOUND!
mic
Start speaking...
Voice search is only supported in Safari and Chrome.
Shrink
Navigate to
near_me
Linear Algebra
52 guides
keyboard_arrow_down
1. Vectors
2. Matrices
3. Linear equations
4. Matrix determinant
5. Vector space
6. Special matrices
7. Eigenvalues and Eigenvectors
8. Orthogonality
9. Matrix decomposition
check_circle
Mark as learned
thumb_up
0
thumb_down
0
chat_bubble_outline
0
auto_stories new
settings

# Python List | sort method

schedule Mar 5, 2023
Last updated
local_offer
Python
Tags
tocTable of Contents
expand_more
map
Check out the interactive map of data science

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.

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.

Published by Isshin Inada
Edited by 0 others
Did you find this page useful?
thumb_up
thumb_down
Comment
Citation
Ask a question or leave a feedback...
Official Python Documentation
https://docs.python.org/3/howto/sorting.html
thumb_up
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!
Navigation
Home Blog Help
Contact us