List comprehension for loops Python
sum works here:
total = sum(x+y for x in (0,1,2,3) for y in (0,1,2,3) if x < y)
As an alternative to writing loops N levels deep, you could use itertools.product():
In [1]: import itertools as itIn [2]: for x, y in it.product((0,1,2,3),(0,1,2,3)): ...: if x < y: ...: print x, y, x*y0 1 00 2 00 3 01 2 21 3 32 3 6This extends naturally to N dimensions.
Use numpy. This lets you use arrays that add up like vectors:
x = numpy.arange(3)y = numpy.arange(3)total = x + yWith the modified question, add a call to sum as well
total = numpy.sum(x+y)