Break a list into chunks of size N in Python

Method 1: Using yield
The yield keyword enables a function to comeback where it left off when it is called again. This is the critical difference from a regular function. A regular function cannot comes back where it left off. The yield keyword helps a function to remember its state. The yield enables a function to suspend and resume while it turns in a value at the time of the suspension of the execution.

my_list = ['geeks', 'for', 'geeks', 'like', 
           'geeky','nerdy', 'geek', 'love', 
               'questions','words', 'life'] 
  
# Yield successive n-sized 
# chunks from l. 
def divide_chunks(l, n): 
      
    # looping till length l 
    for i in range(0, len(l), n):  
        yield l[i:i + n] 
  
# How many elements each 
# list should have 
n = 5
  
x = list(divide_chunks(my_list, n)) 
print (x) 

Output:

[['geeks', 'for', 'geeks', 'like', 'geeky'], 
 ['nerdy', 'geek', 'love', 'questions', 'words'], 
 ['life']]

Method 2: Using List comprehension
List comprehension is an elegant way to break a list in one line of code.

my_list = [1, 2, 3, 4, 5, 
              6, 7, 8, 9] 
  
# How many elements each 
# list should have 
n = 4 
  
# using list comprehension 
final = [my_list[i * n:(i + 1) * n] for i in range((len(my_list) + n - 1) // n )]  
print (final) 

Output:

[[1, 2, 3, 4], [5, 6, 7, 8], [9]]

Alternate Implementation :

l = [1, 2, 3, 4, 5, 6, 7, 8, 9]  
   
# How many elements each  
# list should have  
n = 4
   
# using list comprehension  
x = [l[i:i + n] for i in range(0, len(l), n)]  
print(x) 

Output:

[[1, 2, 3, 4], [5, 6, 7, 8], [9]]

My Personal Notes

Recommended Posts:

Shantanu Sharma.

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Improved By : sloanlancegeeksforgeeksorg