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
chevron_left Cookbooks
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
chevron_left Cookbooks
0
thumb_down
0
chat_bubble_outline
0
auto_stories new
settings

Counting occurrences of each item in Python

Standard Library
chevron_right
collections
chevron_right
Cookbooks
schedule Jul 1, 2022
Last updated
local_offer Python
Tags

Counting occurrence of an item in a list

Consider the following list:

lists = [1,5,3,5,5]

To count the number of a value (5 in this case) in a list:

print(lists.count(5))
3

Counting occurrence of each item in a list

We can use Counter within the Collections module to count the occurrences of each item in a sequence.

To count occurrences of each item in my_list:

from collections import Counter
my_list = ['a', 'b', 'b', 'c', 'c','c']
occurrences = Counter(my_list)
print(occurrences)
Counter({'c': 3, 'b': 2, 'a': 1})

We can see that 'c' appears 3 times, 'b' appears 2 times and 'a' appears once in my_list.

mail
Join our newsletter for updates on new DS/ML comprehensive guides (spam-free)
robocat
Published by Arthur Yanagisawa
Edited by 0 others
Did you find this page useful?
Ask a question or leave a feedback...
0
thumb_down
0
chat_bubble_outline
0
settings
Enjoy our search
Hit / to insta-search docs and recipes!