1、多線(xiàn)程技術(shù)1

python內(nèi)置的threading模塊，可以支持多線(xiàn)程

所有的進(jìn)程默認(rèn)都有一個(gè)線(xiàn)程(一般叫這個(gè)線(xiàn)程為主線(xiàn)程)，其他的線(xiàn)程叫子線(xiàn)程
如果想要在進(jìn)程中添加其他的線(xiàn)程，就創(chuàng)建線(xiàn)程對(duì)象
"""
import threading
import time

def download(file, time1):
    print('開(kāi)始下載',file)
    time.sleep(time1)
    print(file, '下載結(jié)束')

if __name__ == '__main__':
    print('abc')

    # 1.創(chuàng)建線(xiàn)程對(duì)象
    """
    target: 需要在子線(xiàn)程中執(zhí)行的函數(shù)
    args: 調(diào)用函數(shù)的實(shí)參列表（參數(shù)類(lèi)型是列表）
    返回值: 線(xiàn)程對(duì)象
    """
    t1 = threading.Thread(target=download, args=['愛(ài)情公寓', 10])
    # 2.在子線(xiàn)程中執(zhí)行任務(wù)
    t1.start()

    t2 = threading.Thread(target=download, args=['狄仁杰', 5])
    t2.start()

    # download('愛(ài)情公寓')
    # download('狄仁杰')
    print('=====')

    # t3 = threading.Thread(target=input, args=['>>>'])
    # t3.start()
    value = input('>>>')
    print('!!!!')

二、多線(xiàn)程技術(shù)2

方式2：寫(xiě)一個(gè)自己的線(xiàn)程類(lèi)
1.寫(xiě)一個(gè)類(lèi)，繼承自Thread類(lèi)
2.重寫(xiě)run方法，在里面規(guī)定需要在子線(xiàn)程中執(zhí)行的任務(wù)
3.實(shí)現(xiàn)在子線(xiàn)程中執(zhí)行的任務(wù)對(duì)應(yīng)的功能，如果需要參數(shù)，通過(guò)類(lèi)的對(duì)象屬性來(lái)傳值
"""

from threading import Thread
import requests
import re



# 下載數(shù)據(jù)
class DownloadThread(Thread):
    """下載類(lèi)"""
    def __init__(self, file_path):
        super().__init__()
        self.file_path = file_path

    def run(self):
        """run方法"""
        """
        1.寫(xiě)在這個(gè)方法的內(nèi)容就是在子線(xiàn)程中執(zhí)行的內(nèi)容
        2.這個(gè)方法不要直接調(diào)用
        """
        print('開(kāi)始下載')
        response = requests.request('GET', self.file_path)
        data = response.content

        # 獲取文件后綴
        suffix = re.search(r'\.\w+$', self.file_path).group()

        with open('./abc'+suffix, 'wb') as f:
            f.write(data)
        print('下載完成...')


if __name__ == '__main__':
    print('=====')
    t1 = DownloadThread('http://10.7.181.117/shareX/Git.exe')
    # 通過(guò)start間接調(diào)用run方法，run方法中的任務(wù)在子線(xiàn)程中執(zhí)行
    t1.start()
    # 直接調(diào)用run方法，run方法中的任務(wù)在當(dāng)前線(xiàn)程中執(zhí)行
    # t1.run()

    t2 = DownloadThread('https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1533720058151&di=766b5c97653351e805c85881ecaa57d0&imgtype=0&src=http%3A%2F%2Fx.itunes123.com%2Fuploadfiles%2Fb2ab55461e6dc7a82895c7425fc89017.jpg')
    t2.start()

    print('!!!!!')

三、多線(xiàn)程應(yīng)用

import socket
from threading import Thread


class CoversationThread(Thread):
    """在子線(xiàn)程中處理不同的客戶(hù)端會(huì)話(huà)"""
    """
    python中可以在函數(shù)參數(shù)的后面加一個(gè)冒號(hào)，來(lái)對(duì)參數(shù)的類(lèi)型進(jìn)行說(shuō)明
    """
    def __init__(self, conversation:socket.socket, address):
        super().__init__()
        self.conversation = conversation
        self.address = address

    def run(self):
        while True:
            self.conversation.send('你好!'.encode())
            print(self.address,self.conversation.recv(1024).decode(encoding='utf-8'))



if __name__ == '__main__':

    server = socket.socket()
    server.bind(('10.7.181.117', 8080))
    server.listen(512)

    while True:

        conversation, address = server.accept()
        t = CoversationThread(conversation, address)
        t.start()
        # while True:
        #     conversation.send('你好！'.encode())
        #     print(conversation.recv(1024).decode(encoding='utf-8'))

"""client"""
import socket

if __name__ == '__main__':
    client = socket.socket()
    client.connect(('10.7.181.117', 8080))
    while True:
        print(client.recv(1024).decode(encoding='utf-8'))
        message = input('>>>')
        client.send(message.encode())

四、jion函數(shù)

from threading import Thread,currentThread
import time
from random import randint


class Download(Thread):
    def __init__(self, file):
        # 這兒父類(lèi)的init方法必須調(diào)用，否則當(dāng)前這個(gè)創(chuàng)建的對(duì)象中就沒(méi)有新的線(xiàn)程
        super().__init__()
        self.file = file

    def run(self):
        print(currentThread())
        print('開(kāi)始下載:%s' % self.file)
        time.sleep(randint(5, 10))
        print('%s下載結(jié)束' % self.file)



if __name__ == '__main__':

    # time.time(): 獲取當(dāng)前時(shí)間-時(shí)間戳
    start_time = time.time()
    t1 = Download('最強(qiáng)Z.mp4')
    t1.start()

    t2 = Download('最強(qiáng)A.mp4')
    t2.start()

    print('====')
    # 獲取當(dāng)前線(xiàn)程
    """
    主線(xiàn)程: MainThread
    子線(xiàn)程: Thread-數(shù)字（數(shù)字從1開(kāi)始。）
    """
    print(currentThread())

    # 如果一個(gè)任務(wù)想要在另外一個(gè)子線(xiàn)程中的任務(wù)執(zhí)行完成后再執(zhí)行，就在當(dāng)前任務(wù)前用子線(xiàn)程對(duì)象調(diào)用join方法
    # 所以join也會(huì)阻塞線(xiàn)程，阻塞到對(duì)應(yīng)的子線(xiàn)程中任務(wù)執(zhí)行完為止
    t1.join()

    # t2.join()
    end_time = time.time()
    print('總共消耗時(shí)間:%.2f' % (end_time - start_time))