requests库访问网站

import requests
from bs4 import BeautifulSoup
alluniv = []
def getHTMLText(url):
    try:
        r = requests.get(url,timeout = 30)
        r.raise_for_status()
        r.encoding = 'utf-8'
        return r.text
    except:
        return "error"
def xunhuang(url):
     for i in range(20):
         getHTMLText(url)
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 printf():
     print("\n")
     print("\n")
     print("\n")
def main():
     url = "http://www.google.com"
     html=getHTMLText(url)
     xunhuang(url)
     print(html)
     soup=BeautifulSoup(html,"html.parser")
     fillunivlist(soup)
     print(html)
     printf()
     print(soup.title)
     printf()
     print(soup.head)
     printf()
     print(soup.body)
main()