Skip to content
Related Articles

Related Articles

Improve Article

Python Program to get K length groups with given summation

  • Last Updated : 26 Mar, 2021

Given a list, our task is to write a Python program to extract all K length sublists with lead to given summation. 

Input : test_list = [6, 3, 12, 7, 4, 11], N = 21, K = 4

Output : [(6, 6, 6, 3), (6, 6, 3, 6), (6, 3, 6, 6), (6, 7, 4, 4), (6, 4, 7, 4), (6, 4, 4, 7), (3, 6, 6, 6), (3, 3, 3, 12), (3, 3, 12, 3), (3, 3, 4, 11), (3, 3, 11, 4), (3, 12, 3, 3), (3, 7, 7, 4), (3, 7, 4, 7), (3, 4, 3, 11), (3, 4, 7, 7), (3, 4, 11, 3), (3, 11, 3, 4), (3, 11, 4, 3), (12, 3, 3, 3), (7, 6, 4, 4), (7, 3, 7, 4), (7, 3, 4, 7), (7, 7, 3, 4), (7, 7, 4, 3), (7, 4, 6, 4), (7, 4, 3, 7), (7, 4, 7, 3), (7, 4, 4, 6), (4, 6, 7, 4), (4, 6, 4, 7), (4, 3, 3, 11), (4, 3, 7, 7), (4, 3, 11, 3), (4, 7, 6, 4), (4, 7, 3, 7), (4, 7, 7, 3), (4, 7, 4, 6), (4, 4, 6, 7), (4, 4, 7, 6), (4, 11, 3, 3), (11, 3, 3, 4), (11, 3, 4, 3), (11, 4, 3, 3)]

Explanation : All groups of length 4 and sum 21 are printed.

Input : test_list = [6, 3, 12, 7, 4, 11], N = 210, K = 4



Output : []

Explanation : Since no 4 size group sum equals 210, no group is printed as result.

Method : Using sum() + product() + loop 

In this all possible sublists of length K are computed using product(), sum() is used to compare the sublist’s sum with the required summation. 

Python3




# Python3 code to demonstrate working of
# K length groups with given summation
# Using sum + product()
from itertools import product
  
# initializing list
test_list = [6, 3, 12, 7, 4, 11]
               
# printing original list
print("The original list is : " + str(test_list))
  
# initializing Summation 
N = 21
  
# initializing size 
K = 4
  
# Looping for each product and comparing with required summation
res = []
for sub in product(test_list, repeat = K):
  if sum(sub) == N:
    res.append(sub)
          
# printing result
print("The sublists with of given size and sum : " + str(res))

Output:

The original list is : [6, 3, 12, 7, 4, 11]

The sublists with of given size and sum : [(6, 6, 6, 3), (6, 6, 3, 6), (6, 3, 6, 6), (6, 7, 4, 4), (6, 4, 7, 4), (6, 4, 4, 7), (3, 6, 6, 6), (3, 3, 3, 12), (3, 3, 12, 3), (3, 3, 4, 11), (3, 3, 11, 4), (3, 12, 3, 3), (3, 7, 7, 4), (3, 7, 4, 7), (3, 4, 3, 11), (3, 4, 7, 7), (3, 4, 11, 3), (3, 11, 3, 4), (3, 11, 4, 3), (12, 3, 3, 3), (7, 6, 4, 4), (7, 3, 7, 4), (7, 3, 4, 7), (7, 7, 3, 4), (7, 7, 4, 3), (7, 4, 6, 4), (7, 4, 3, 7), (7, 4, 7, 3), (7, 4, 4, 6), (4, 6, 7, 4), (4, 6, 4, 7), (4, 3, 3, 11), (4, 3, 7, 7), (4, 3, 11, 3), (4, 7, 6, 4), (4, 7, 3, 7), (4, 7, 7, 3), (4, 7, 4, 6), (4, 4, 6, 7), (4, 4, 7, 6), (4, 11, 3, 3), (11, 3, 3, 4), (11, 3, 4, 3), (11, 4, 3, 3)]

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course




My Personal Notes arrow_drop_up
Recommended Articles
Page :