基于类和基于函数的python多线程样例

不断的练，加深记忆吧。

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import threading
import time
 
exitFlag = 0
 
def first_function():
    print (threading.currentThread().getName() + \
           str(' is Starting \n'))
    time.sleep(2)
    print (threading.currentThread().getName() + \
           str(' is Exiting \n'))
 
def second_function():
    print (threading.currentThread().getName() + \
           str(' is Starting \n'))
    time.sleep(2)
    print (threading.currentThread().getName() + \
           str(' is Exiting \n'))
 
def third_function():
    print (threading.currentThread().getName() + \
           str(' is Starting \n'))
    time.sleep(2)
    print (threading.currentThread().getName() + \
           str(' is Exiting \n'))
 
class myThread(threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
    def run(self):
        print("Starting " + self.name)
        print_time(self.name, self.counter, 5)
        print("Exiting " + self.name)
 
def print_time(threadName, delay, counter):
    while counter:
        if exitFlag:
            thread.exit()
        time.sleep(delay)
        print("%s: %s" % (threadName, time.ctime(time.time())))
        counter -= 1
 
if __name__ == "__main__":
    t1 = threading.Thread\
         (name='first_function', target=first_function)
    t2 = threading.Thread\
         (name='second_function', target=second_function)
    t3 = threading.Thread\
         (name='third_function', target=third_function)
 
    t1.start()
    t2.start()
    t3.start()
    t1.join()
    t2.join()
    t3.join()
 
    thread1 = myThread(1, "Thread-1", 1)
    thread2 = myThread(2, "Thread-2", 2)
    thread1.start()
    thread2.start()
    thread1.join()
    thread2.join()
    print("Exiting Main Thread")