serial_test.py

import numpy as np
import time
import os
import math



def task(bound):
    l = []
    #np.random.seed((os.getpid() * int(time.time())) % 123456789)
    # bound should be > 50000
    x = [math.sqrt(i) for i in range(1, bound)]
    a = sum(x)
    b = sum(x)
    return a,b
    #r = abs(np.random.normal(1,1))
    #time.sleep(r)
    #write(r)

def write(data):
    try:
        f = open("race.txt",'a')
        w_str = (
            f"{data}\n"
            f"{time.time()}\n"
            f"print('module name:', {__name__})\n"
            f"print('parent process:', {os.getppid()})\n"
            f"print('process id:', {os.getpid()})\n"
            )
        f.write(w_str)
        f.close()
    finally:
        pass

st          = time.time()
global_list = []
for i in range(4):
    global_list.append(task(100000000))
print(global_list)
print(f"Time: {time.time()-st}")