greplin3.py

import csv
import itertools
def findsubsets(S,m):
    return list(itertools.combinations(S, m))

#numlist = (1, 2, 3, 4, 6)
csvreader = csv.reader(open('numbers.csv','rb'), skipinitialspace=True)
numlist = [int(x) for x in csvreader.next()]
answer = 0
possibles = []
for x in range(3,len(numlist)):
    possibles.append(findsubsets(numlist,x))
for x in possibles:
    for i in x:
        listi = list(i)
        max = listi.pop(-1)
        if max == sum(listi): 
            answer += 1
        else: pass
print answer