UDP/爬虫/HTML

#接受端代码（更改IP地址即可，其余无须修改）
import socket
#使用IPV4协议，使用UDP协议传输数据
s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
#绑定端口和端口号，空字符串表示本机任何可用IP地址
s.bind((‘100.100.100.100‘, 5000)) #更改IP地址即可
while True:
    data, addr=s.recvfrom(1024)
     #显示接收到的内容
    print(‘received message:{0} from PORT {1} on {2}‘.format(data.decode(),addr[1], addr[0]))
    if data.decode().lower() == ‘bye‘:
        break
s.close( )

#接受端代码（更改IP地址即可）
import socket
import sys
s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto(sys.argv[1].encode() , ("100.100.100.100" ,5000))
#假设100.100.100.100是接收端机器的IP地址
s.close( )

import requests
from bs4 import BeautifulSoup
def getHTMLText(url):
    try:
        r=requests.get(url,timeout=30)
        soup=BeautifulSoup(r.text)
        r.raise_for_status()
        r.encoding=‘utf-8‘
        return r.text,r.status_code,len(r.text),r.encoding,len(soup.text)
    except:
        return ""
    
url="https://www.baidu.com"  #这是一个网页链接，自行更改即可
for i in range(20):
    print(i)
    print(getHTMLText(url))

import requests
from bs4 import BeautifulSoup
import csv
import pandas as pd

allUniv=[]

def getHTMLText(url):
    try:
        r=requests.get(url,timeout=30)
        r.raise_for_status()
        r.encoding=‘utf-8‘
        return r.text
    except:
        return ""
    
def fillUnivList(soup):
    data=soup.find_all(‘tr‘)
    for tr in data:
        ltd=tr.find_all(‘td‘)
        if len(ltd)==0:
            continue
        singleUniv=[]
        for td in ltd:
            singleUniv.append(td.string)
        allUniv.append(singleUniv)
        
def printUnivList(num):
    print("{:^4}{:^10}{:^5}{:^8}{:^10}".format("排名","学校名称","省市","总分","年费"))
    for i in range(num):
        u=allUniv[i]
        print("{:^4}{:^10}{:^5}{:^8}{:^10}".format(u[0],u[1],u[2],u[3],u[6]))
    return u

def main(num):
    url = ‘http://www.zuihaodaxue.cn/zuihaodaxuepaiming2018.html‘
    html = getHTMLText(url)
    soup = BeautifulSoup(html, "html.parser")
    fillUnivList(soup)
    printUnivList(num)
    print("结果如上所示")

main(100)

DOCTYPE html>
html>
head>
meta charset="utf-8">
title>lalalalalala(lalalalala.com)title>
head>
body>

h1>HTML初尝试h1>
p>3132 啦啦啦啦啦。p>

body>
html>