使用requests爬取网页的三种解析方式(正则、bs4、Xpath)
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2022-07-13 12:59:55
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转载自:爬虫,爬取豆瓣书城首页的书籍信息,requests下载页面,三种解析方式(正则,bs4,xpath)
目录
0x00 requests爬取网页
import requests
r = requests.get('https://book.douban.com/')
content = r.text
0x01 解析方式一——正则
import re
pattern=re.compile('<h4.*?>(.*?)</h4>.*?<p>.*?author">.*?(.*?)</span>.*?year">.*?(.*?)</span>.*?publisher">.*?(.*?)</span>.*?</p>',re.S)
results = re.findall(pattern, content)
print(results)
for result in results:
name,author,time,chuban=result
name=re.sub("\s",'',name).replace(' ','').strip()
author=re.sub('\s','',author).strip()
time=re.sub("\s",'',time).strip()
chuban=re.sub("\s",'',chuban).strip()
print(name,author,time,chuban)
0x02 解析方式二——bs4
from bs4 import BeautifulSoup
html = r.content
soup = BeautifulSoup(html,"lxml")
print(type(soup))
name = soup.findAll(name='h4',class_='title',text=re.compile(".*?"))
author=soup.findAll(name='span',class_='author',text=re.compile(".*?"))
time=soup.findAll(name='span',class_="year",text=re.compile(".*?"))
chuban=soup.findAll(name="span",class_="publisher",text=re.compile((".*?")))
0x03 解析方式三——Xpath
from lxml import etree
html=r.content
tree = etree.HTML(html)
name=tree.xpath("//h4/text()")
author=tree.xpath("//span[@class='author']/text()")
time=tree.xpath("//span[@class='year']/text()")
chuban=tree.xpath("//span[@class='publisher']/text()")
print(name,author,time,chuban)
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