python 笔记 之 多线程-共享内存

'''
多线程-共享内存

'''

import threading
import time


class Hello(threading.Thread):
    def __init__(self,args):
        super(Hello,self).__init__()
        self.args = args
        global a
        print("### a = {0}".format(a))
        a += 1

    def run(self):
        print("开始子进程{0}".format(self.args))
        #time.sleep(1)
        print("结束子进程{0}".format(self.args))


if __name__ == '__main__':
    a = 1
    print("start main")
    t1 = Hello(5)
    time.sleep(3)
    t2 = Hello(5)
    t1.start()
    t2.start()
    print(" a = {0}".format(a))
    print("end main")