Python多线程共享全局变量的实现代码

#验证同一个进程内的所有线程共享全局变量from threading import  Threadimport timeg_num=1000def work1():    global g_num    g_num+=3    print("work1----num:",g_num)def work2():    global g_num    print("work2---num:",g_num)if __name__ == '__main__':    print("start---num:",g_num)    t1=Thread(target=work1)    t1.start()    #故意停顿一秒，以保证线程1执行完成    time.sleep(1)    t2=Thread(target=work2)    t2.start()

start---num: 1000work1----num: 1003work2---num: 1003