简单创建多线程

0. 导入多线程模块

import threading

1. 方法开启多线程

先将执行操作定义到方法内部

def test(name):    for value in range(5):        print('thread:{}\tcount:{}'.format(name,value))

多线程开启方法执行

threading._start_new_thread(test,('one',))threading._start_new_thread(test,('two',))threading._start_new_thread(test,('three',))

注意：括号两个参数，第一个是方法对象，第二个是参数元组

当元组内部只有一个元素时，后面需要添加逗号，和小括号进行区分

执行结果

thread:onecount:0thread:threecount:0thread:twocount:0thread:onecount:1thread:threecount:1thread:twocount:1thread:onecount:2thread:threecount:2thread:twocount:2thread:onecount:3thread:threecount:3thread:twocount:3thread:onecount:4thread:threecount:4thread:twocount:4

注意：当程序主线程执行完毕，子线程会被终止，所以需要让主线程睡一会(目前我的程度只能这样)

import timetime.sleep(2)

线程对象

和普通对象区别在于两点

0. 类：继承threading.Thread对象

1. 方法：

__init__：初始化方法必须调用父类方法初始化，才能进行本类初始化操作，父类初始化不带外参

run：开启线程操作主要完成的操作语句在此定义

2. 调用：start准备，后续自动调用，遵循线程生命周期

import threadingimport timeclass MyHead(threading.Thread):    def __init__(self,name):        super(MyHead, self).__init__()        self.name = name    def run(self):        for value in range(5):            print('thread:{}\tcount:{}'.format(self.name,value))thread1 = MyHead('one')thread2 = MyHead('two')thread1.start()thread2.start()

线程对象会自动自行完毕，再关闭主线程，无需sleep

结果：

thread:onecount:0thread:onecount:1thread:onecount:2thread:twocount:0thread:onecount:3thread:onecount:4thread:twocount:1thread:twocount:2thread:twocount:3thread:twocount:4