BeautifulSoup库快速上手
安装
pip install beautifulsoup4 # 上面的安装失败使用下面的 使用镜像 pip install beautifulsoup4 -i https://pypi.tuna.tsinghua.edu.cn/simple
使用PyCharm的命令行
解析标签
from bs4 import BeautifulSoup import requests url="https://blog.csdn.net/weixin_42403632/category_11076268.html" headers={"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0"} html=requests.get(url,headers=headers).text s=BeautifulSoup(html,"html.parser") title =s.select("h2") for i in title: print(i.text)
第一行代码:导入BeautifulSoup库
第二行代码:导入requests
第三、四、五行代码:获取url的html
第六行代码:激活BeautifulSoup库 "html.parser"设置解析器为HTML解析器
第七行代码:选取所有<h2>
标签
解析属性
BeautifulSoup库 支持根据特定属性解析网页元素
根据class值解析
from bs4 import BeautifulSoup import requests url="https://blog.csdn.net/weixin_42403632/category_11076268.html" headers={"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0"} html=requests.get(url,headers=headers).text s=BeautifulSoup(html,"html.parser") title =s.select(".column_article_title") for i in title: print(i.text)
根据ID解析
from bs4 import BeautifulSoup html="""<div class="crop-img-before"> <img src="" </div> <div id="title"> 测试成功 </div> <div class="crop-zoom"> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="bt-reduce">-</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="bt-add">+</a> </div> <div class="crop-img-after"> <div class="final-img"></div> </div>""" s=BeautifulSoup(html,"html.parser") title =s.select("#title") for i in title: print(i.text)
多层筛选
from bs4 import BeautifulSoup html="""<div class="crop-img-before"> <img src="" </div> <div id="title"> 456456465 <h1>测试成功</h1> </div> <div class="crop-zoom"> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="bt-reduce">-</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="bt-add">+</a> </div> <div class="crop-img-after"> <div class="final-img"></div> </div>""" s=BeautifulSoup(html,"html.parser") title =s.select("#title") for i in title: print(i.text) title =s.select("#title h1") for i in title: print(i.text)
提取a标签中的网址
title =s.select("a") for i in title: print(i["href"])
实战-获取博客专栏 标题+网址
from bs4 import BeautifulSoup import requests import re url="https://blog.csdn.net/weixin_42403632/category_11298953.html" headers={"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0"} html=requests.get(url,headers=headers).text s=BeautifulSoup(html,"html.parser") title =s.select(".column_article_list li a") for i in title: print((re.findall("原创.*? (.*?) ",i.text))[0].lstrip()) print(i["href"])
到此这篇关于Python实战快速上手BeautifulSoup库爬取专栏标题和地址的文章就介绍到这了,更多相关Python BeautifulSoup库内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家!
原文链接:https://blog.csdn.net/weixin_42403632/article/details/120852131