Find all combinations of a list of numbers with a given sum

Question

I have a list of numbers, e.g.

numbers = [1, 2, 3, 7, 7, 9, 10]

As you can see, numbers may appear more than once in this list.

I n

Answer 1

@qasimalbaqali

This may not be exactly what the post is looking for, but if you wanted to:

Find all combinations of a range of numbers [lst], where each lst contains N number of elements, and that sum up to K: use this:

# Python3 program to find all pairs in a list of integers with given sum  
from itertools import combinations 

def findPairs(lst, K, N): 
    return [pair for pair in combinations(lst, N) if sum(pair) == K] 

#monthly cost range; unique numbers
lst = list(range(10, 30))
#sum of annual revenue per machine/customer
K = 200
#number of months (12 - 9 = num months free)
N = 9

print('Possible monthly subscription costs that still equate to $200 per year:')
#print(findPairs(lst, K, N)) 
findPairs(lst,K,N)

Results:

Possible monthly subscription costs that still equate to $200 per year:
Out[27]:
[(10, 11, 20, 24, 25, 26, 27, 28, 29),
 (10, 11, 21, 23, 25, 26, 27, 28, 29),
 (10, 11, 22, 23, 24, 26, 27, 28, 29),

The idea/question behind this was "how much can we charge per month if we give x number of months free and still meet revenue targets".