python用event实现门禁卡功能

有一个event使用的例子，员工进公司门要刷卡，我们这里设置一个线程是“门”，再设置几个线程为“员工”，员工看到门没打开，就刷卡，刷完卡，门开了，员工就可以通过。

 1 #_*_coding:utf-8_*_
 2 __author__ = 'Alex Li'
 3 import threading
 4 import time
 5 import random
 6 
 7 def door():
 8     door_open_time_counter = 0
 9     while True:
10         if door_swiping_event.is_set():
11             print("33[32;1mdoor opening....33[0m")
12             door_open_time_counter +=1
13 
14         else:
15             print("33[31;1mdoor closed...., swipe to open.33[0m")
16             door_open_time_counter = 0 #清空计时器
17             door_swiping_event.wait()
18 
19 
20         if door_open_time_counter > 3:#门开了已经3s了,该关了
21             door_swiping_event.clear()
22 
23         time.sleep(0.5)
24 
25 
26 def staff(n):
27 
28     print("staff [%s] is comming..." % n )
29     while True:
30         if door_swiping_event.is_set():
31             print("33[34;1mdoor is opened, passing.....33[0m")
32             break
33         else:
34             print("staff [%s] sees door got closed, swipping the card....." % n)
35             print(door_swiping_event.set())
36             door_swiping_event.set()
37             print("after set ",door_swiping_event.set())
38         time.sleep(0.5)
39 door_swiping_event  = threading.Event() #设置事件
40 
41 
42 door_thread = threading.Thread(target=door)
43 door_thread.start()
44 
45 
46 
47 for i in range(5):
48     p = threading.Thread(target=staff,args=(i,))
49     time.sleep(random.randrange(3))
50     p.start()

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