1. 客户端和服务器聊天，可以一直聊天，直到一方发送’拜拜’。然后就可以和下一个人一直聊
   服务器

import socket
server=socket.socket()
server.bind(('10.7.153.133',6666))

server.listen(512)
while True:
    connect, addr = server.accept()
    print(addr)
    while True:

        recv_data=connect.recv(1024)
        print('客户端说：'+str(recv_data,encoding='utf-8'))
        if str(recv_data,encoding='utf-8')=='拜拜':
            connect.close()
            break
        message=input('服务器发送：')
        if message=='拜拜':
            connect.close()
            break
        connect.send(bytes(message,encoding='utf-8'))

客户端

import socket

client=socket.socket()
client.connect(('10.7.153.133',6666))

while True:

    message=input('客户端发送：')

    client.send(message.encode())

    recv_data=client.recv(1024)
    print('从服务器接收：'+str(recv_data,encoding='utf-8'))
client.close()

2,2. 下载网络图片（

https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2808438283,4249462766&fm=26&gp=0.jpg）到本地

import requests

url='https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2808438283,4249462766&fm=26&gp=0.jpg'

response=requests.get(url)
print(response)
content=response.content
with open('./files/tupian.jpg','wb') as f:
    f.write(content)

tupian.jpg