24/4作业

• 整理并发编程三天内容理论，用自己的概述
• 需要掌握如何开设进程和如何开设线程的代码

开设进程
from multiprocessing import Process
import time
import random

def task(name):
    print('%s is running'%name)
    time.sleep(3)
    print('%s id over'%name)

if __name__ == '__main__':
    p=Process(target=task,args=('jason',))
    p.start()
    print('这是主进程')
开设线程
from multiprocessing import Process
from threading import Thread
import time

def task(name):
    print('%s is running'%name)
    time.sleep(1)
    print('%s is over'%name)
t=Thread(target=task,args=('egon',))
t.start()
print('这是主线程')

• 利用多进程或多线程自己实现TCP服务端的并发

服务端
import socket
from multiprocessing import Process
from threading import Thread

server=socket.socket()#括号内不加参数默认是tcp协议
server.bind(('0.0.0.0',8000))
server.listen(5)

def task(conn,addr):
    #通信循环
    while True:
        try:
            data=conn.recv(1024)
            if len(data) == 0:break
            print('客户端地址：',addr)
            conn.send(data.upper())
        except ConnectionRefusedError as e:
            print(e)
            break
    conn.close()

#链接循环
while True:
    conn,addr=server.accept()
    t=Thread(target=task,args=(conn,addr))
    t.start()
客户端
import socket
client=socket.socket()
client.connect(('39.97.209.187',8000))
while True:
    msg=input('your cmd>>:').strip()
    if msg == 'q':break
    client.send(msg.encode('utf-8'))
    data=client.recv(1024)
    print(data.decode('utf-8'))

• 整理python基础阶段知识点及项目代码，ATM购物车，选课系统一定要自己脱稿从头到位敲出来
  atm链接：https://www.cnblogs.com/lqb666/p/12685877.html
  course system链接:https://www.cnblogs.com/lqb666/p/12702517.html
• 预习并发编程剩余知识点，参考博客小猿取经