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import json,time# 读写数据库中的票数def wr_info(sign,dic=None):	if sign == "r":		with open("ticket",mode="r",encoding="utf-8") as fp:			dic = json.load(fp)		return dic			elif sign == "w":		with open("ticket",mode="w",encoding="utf-8") as fp:			json.dump(dic,fp)		# res = wr_info("r")# print(res)# dic = {"count":0}# wr_info("w",dic)# 抢票方法def get_ticket(person):	# 获取数据库中实际的票数	dic = wr_info("r")	print(dic)		# 模拟一下网络延迟	time.sleep(0.5)		# 判断票数	if dic["count"] > 0 :			print("%s抢到票了" % (person))		dic["count"] -= 1		wr_info("w",dic)	else:		print("%s没有抢到这张票" % (person))def run(person,lock):		# 查看剩余票数	dic = wr_info("r")		print("%s 查询票数: %s" % (person , dic["count"]) )				# 上锁	lock.acquire()	# 开始抢票	get_ticket(person)	lock.release()if __name__ == "__main__":	lock = Lock()	lst = ["科比","麦迪","高峰","姚明","邓肯","成龙","刘亦菲"]	for i in lst:		p = Process(target=run,args=(i,lock))		p.start()

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