from threading import Thread

import time

g_num = 100

def work1():

    global g_num

    for i in range(3):

        g_num += 1

    print("----in work1, g_num is %d---"%g_num)

def work2():

    global g_num

    print("----in work2, g_num is %d---"%g_num)

print("---线程创建之前g_num is %d---"%g_num)

t1 = Thread(target=work1)

t1.start()

#延时一会，保证t1线程中的事情做完

time.sleep(1)

t2 = Thread(target=work2)

t2.start()

from threading import Thread

import time

def work1(nums):

    nums.append(44)

    print("----in work1---",nums)

def work2(nums):

    #延时一会，保证t1线程中的事情做完

    time.sleep(1)

    print("----in work2---",nums)

g_nums = [11,22,33]

t1 = Thread(target=work1, args=(g_nums,))

t1.start()

t2 = Thread(target=work2, args=(g_nums,))

t2.start()