from concurrent.futures import ThreadPoolExecutor

def test(paramlist, startIndex, stopIndex):
    sum = 0
    for i in range(startIndex, stopIndex):
        sum += paramlist[i]
    return sum


def splitproblem(total, workers):
    add = total // workers;
    remain = total % workers;

    curIndex = 0

    ret = []

    for i in range(0, workers):
        ret.append(curIndex)

        curIndex += add

        if(remain > 0):
            remain -= 1
            curIndex += 1;

    ret.append(total)

    return ret

if __name__ == "__main__":
    testlist = range(0, 10000)
    num_threads = 12

    list_size = len(testlist)

    indices = splitproblem(list_size, num_threads)

    with ThreadPoolExecutor(max_workers=num_threads) as executor:
        futures = []
        for idx in range(0, num_threads):
            futures.append(executor.submit(test, testlist, indices[idx], indices[idx+1]))

        sum = 0

        for future in futures:
            result = future.result()
            sum += result

        print(sum)