python 多线程Thread

demo1

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import time
from threading import Thread
# 自定义线程函数。
def main(name="Python"):
    for i in range(2):
        print("hello", name)
        time.sleep(1)
 
# 创建线程01，不指定参数
thread_01 = Thread(target=main)
# 启动线程01
thread_01.start()

# 创建线程02，指定参数，注意逗号
thread_02 = Thread(target=main, args=("MING",))
# 启动线程02
thread_02.start()

demo2

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import time
from threading import Thread
class MyThread(Thread):
    def __init__(self, name="Python"):
        # 注意，super().__init__() 一定要写
        # 而且要写在最前面，否则会报错。
        super().__init__()
        self.name=name

    def run(self):
        for i in range(2):
            print("hello", self.name)
            time.sleep(1)

if __name__ == '__main__':
    # 创建线程01，不指定参数
    thread_01 = MyThread()
    # 创建线程02，指定参数
    thread_02 = MyThread("MING")

    thread_01.start()
    thread_02.start()

 demo3

#!/usr/bin/python
# -*- coding: UTF-8 -*-
 
import threading
import time
 
exitFlag = 0
 
class myThread (threading.Thread):   #继承父类threading.Thread
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
    def run(self):                   #把要执行的代码写到run函数里面 线程在创建后会直接运行run函数 
        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:
            (threading.Thread).exit()
        time.sleep(delay)
        print "%s: %s" % (threadName, time.ctime(time.time()))
        counter -= 1
 
# 创建新线程
thread1 = myThread(1, "Thread-1", 1)
thread2 = myThread(2, "Thread-2", 2)
 
# 开启线程
thread1.start()
thread2.start()
 
print "Exiting Main Thread"

参考：
https://www.cnblogs.com/wongbingming/p/9028851.html
https://www.runoob.com/python/python-multithreading.html