Getting all combinations from a list using itertools

Question

I am working on a problem with project Euler and I need to get all combinations of adding int elements in a list,

from itertools import combinations
evenAbs = [12, 18, 20, 24, 30,36]
evenCombs =  sorted(([i+j for i,j in combinations(evenAbs, 2)]))

my problem is that I need the combinations to include 12+12 18+18 etc.. How can I do this?

Answer 1

Use itertools.combinations_with_replacement:

>>> import itertools
>>> list(itertools.combinations_with_replacement([1,2,3], 2))
[(1, 1), (1, 2), (1, 3), (2, 2), (2, 3), (3, 3)]