python多线程实现案例_python多线程Event实现红绿灯案例

代码：

# __author__ = ‘STEVEN‘

# coding = utf-8

import time,threading

#开启事件

event = threading.Event()

count = 0

class Lighter(threading.Thread):

def run(self):

while True:

global count

count += 1

time.sleep(0.4)

event.set()

#设置绿灯时间为10s，红灯为10s

if count>10 and count<=20:

event.clear()

print(‘\033[41;1m red light ..\033[0m‘)

elif count > 20:

count = 0

event.set()

print(‘\033[42;1m green light ..\033[0m‘)

else:

print(‘\033[42;1m green light ..\033[0m‘)

class Car(threading.Thread):

def __init__(self,name):

super(Car,self).__init__()

self.name = name

def run(self):

time.sleep(0.5)

if event.is_set():

print(‘{} passed the light‘.format(self.name))

else:

print(‘{} is waiting the green light‘.format(self.name))

l = Lighter()

l.start()

#启动50辆车，让他们经过红绿灯

for i in range(50):

time.sleep(1)

c = Car(‘car{}‘.format(i))

c.start()