from .__init__ import * def subtractionFunc(maxMinuend=99, maxDiff=99): a = random.randint(0, maxMinuend) b = random.randint(max(0, (a - maxDiff)), a) c = a - b problem = str(a) + "-" + str(b) + "=" solution = str(c) return problem, solution subtraction = Generator("Subtraction", 1, "a-b=", "c", subtractionFunc)