import socket

# 創(chuàng)建 socket 對(duì)象
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 綁定端口
s.bind(('localhost', 12345))

# 設(shè)置最大連接數(shù)，超過(guò)后排隊(duì)
s.listen(5) 

while True:
    # 建立客戶(hù)端連接
    c, addr = s.accept()      
    print ('Got connection from', addr)
    
    # 發(fā)送數(shù)據(jù)
    c.send('Thank you for connecting'.encode())
    
    # 關(guān)閉連接
    c.close()                

import socket              

# 創(chuàng)建 socket 對(duì)象
s = socket.socket()         

# 連接到服務(wù)器
s.connect(('localhost', 12345))

# 接收數(shù)據(jù)
print (s.recv(1024).decode())
s.close()                     

Got connection from ('127.0.0.1', 51768)
Thank you for connecting

# 這是一個(gè)簡(jiǎn)單的命令行聊天室服務(wù)器

import socket
import select

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('localhost', 12345))
server_socket.listen(10)
inputs = [server_socket]

while inputs:
    rs, _, _ = select.select(inputs, [], [])

    for r in rs:
        if r is server_socket:
            client_socket, _ = r.accept()
            inputs.append(client_socket)
        else:
            msg = r.recv(1024)
            if not msg:
                inputs.remove(r)
            else:
                for socket in inputs:
                    if socket is not server_socket:
                        socket.send(msg)

import requests

# 發(fā)起 GET 請(qǐng)求
response = requests.get('https://www.example.com')

# 輸出響應(yīng)的文本信息
print(response.text)

import requests

s = requests.Session()

# 先進(jìn)行登錄
s.post('http://httpbin.org/post', data = {'key':'value'})

# 然后訪問(wèn)需要登錄后才能看到的頁(yè)面
r = s.get('http://httpbin.org/cookies')
print(r.text)

import asyncio
import aiohttp

async def fetch(session, url):
    async with session.get(url) as response:
        return await response.text()

async def main():
    async with aiohttp.ClientSession() as session:
        html = await fetch(session, 'http://python.org')
        print(html)

loop = asyncio.get_event_loop()
loop.run_until_complete(main())

import requests
from bs4 import BeautifulSoup

# 發(fā)起請(qǐng)求
r = requests.get('http://example.com')

# 解析HTML
soup = BeautifulSoup(r.text, 'html.parser')

# 抓取所有的鏈接
links = [a['href'] for a in soup.find_all('a', href=True)]
print(links)

from flask import Flask, render_template

app = Flask(__name__)

@app.route("/")
def hello():
    return render_template('index.html')

if __name__ == "__main__":
    app.run()