全局变量在进程中的传递-不能共享

全局变量在进程中是无法共享的

import time
import multiprocessing

"""
可发现在进程间全局变量不能共享
"""

g_num = 10

def work1():
    global g_num
    for i in range(10):
        g_num += 1
    print("---------work1--------",g_num)

def work2():
    global g_num
    print("----work2----",g_num)


if __name__ == ‘__main__‘:
    process_work1 = multiprocessing.Process(target=work1)
    process_work2 = multiprocessing.Process(target=work2)

    process_work1.start()
    process_work2.start()

    time.sleep(3)
    print("main",g_num）