def first(num):
    if num % 2 == 0:
        return True
    return False
def second(num):
    if num * 3 <= 100000:
        return True
    return False
def main():
    listNums = [i for i in range(1,100000)]
    for nums in listNums:
        if first(nums) and second(nums):
            print(nums)
if __name__ == "__main__":
    main()

 from threading import Thread
def first(num):
    if num % 2 == 0:
        return True
    return False
def second(num):
    if num * 3 <= 100000:
        return True
    return False
def main():
    listNums = [i for i in range(1,100000)]
    for nums in listNums:
        t1 = Thread(target=first, args=(nums,))
        t2 = Thread(target=second, args=(nums,))
        t1.start()
        t2.start()
        if first(nums) and second(nums):
            print(nums)
if __name__ == "__main__":
    main()

time python no-threading
real	0m0.062s
user	0m0.035s
sys	0m0.023s

time python threading
real	0m6.383s
user	0m5.420s
sys	0m3.077s

 from multiprocessing import Process
def first(num):
    if num % 2 == 0:
        return True
    return False
def second(num):
    if num * 3 <= 100000:
        return True
    return False
def main():
    listNums = [i for i in range(1,100000)]
    for nums in listNums:
        t1 = Process(target=first, args=(nums,))
        t2 = Process(target=second, args=(nums,))
        if first(nums) and second(nums):
            print(nums)
if __name__ == "__main__":
    main()

real	0m0.687s
user	0m0.641s
sys	0m0.044s