threading模块

（1）.Thread线程类

【1】构造：

--1.Thread（target = 目标函数, args = (参数,)）

--2.自定义Thread派生类，重写run方法逻辑

【2】.start() 启动线程

【3】.join() 要求主线程等待

【4】.current_thread() 获取当前线程

【5】.name 线程名称

import time

import threading

//方法1

def worker(n):

    print('{threading.current_thread().name}函数执行开始于：{}'.format(time.ctime()))

    time.sleep(n)

    print('{threading.current_thread().name}函数执行结束于：{}'.format(time.ctime()))

def main():

    print(f'[住函数执行开始于：{time.ctime()}]')

    threads = []

    t1 = threading.Thread(target = worker, args = (4,))

    threads.append(t1)

    t2 = threading.Thread(target = worker, args = (2,))    

    threads.append(t2)

for t in threads:

    t.start()

for t in threads:

    t.join() //告诉主线程等待当前线程执行完毕

    print(f'[住函数执行结束于：{time.ctime()}]')

//方法2

def worker(n):

    print('{threading.current_thread().name}函数执行开始于：{}'.format(time.ctime()))

    time.sleep(n)

    print('{threading.current_thread().name}函数执行结束于：{}'.format(time.ctime()))

class MyThread(threading.Thread):

    def __init__(selffunc,args):

        threading.Thread.__init__(self)

        self.func = func

        self.args = args

    def run(self):

        self.func(*self.args)

def main():

    print(f'[住函数执行开始于：{time.ctime()}]')

    threads = []

    t1 = MyThread(worker, (4,))

    threads.append(t1)

    t1 = MyThread(worker, (2,))

    threads.append(t2)

for t in threads:

    t.start()

for t in threads:

    t.join() //告诉主线程等待当前线程执行完毕

    print(f'[住函数执行结束于：{time.ctime()}]')