通过队列实现进程间通信

#_author:来童星
#date:2019/12/17
#通过队列实现进程间通信
from multiprocessing import Process
def plus():
    print('--------子进程1开始---------')
    global g_num
    g_num+=50
    print('g_num is %d'%g_num)
    print('--------子进程1结束---------')


def minus():
    print('--------子进程2开始---------')
    global g_num
    g_num -= 50
    print('g_num is %d' % g_num)
    print('--------子进程2结束---------')
g_num=100
if __name__=='__main__':
    print('--------主进程开始---------')
    print('g_num is %d' % g_num)
    p1=Process(target=plus)
    p2=Process(target=minus)
    p1.start()
    p2.start()
    p1.join()
    p2.join()
    print('--------主进程结束---------')