解析库的安装
pip3 install beautifulsoup4
初始化 BeautifulSoup(str,"解析库")
from bs4 import BeautifulSoup
html='''
<div class="panel">
<div class="panel-heading">
<h4>Hello</h4>
</div>
<div class="panel-body">
<ul class="list" >Bar</li>
</ul>
</div>
</div>
'''
soup = BeautifulSoup(html,"lxml") # soup = BeautifulSoup(html,"html.parser")
标签选择器
选择元素 soup.E
html = """ <html><head><title>The Dormouse's story</title></head> <body> <p class="title" name="dromouse"><b>The Dormouse's story</b></p> <p class="story">Once upon a time there were three little sisters; and their names were <a href="http://example.com/elsie" class="sister" ><!-- Elsie --></a>, <a href="http://example.com/lacie" class="sister" >Lacie</a> and <a href="http://example.com/tillie" class="sister" >Tillie</a>; and they lived at the bottom of a well.</p> <p class="story">...</p> """ from bs4 import BeautifulSoup soup = BeautifulSoup(html, 'lxml') print(soup.title) print(type(soup.title)) print(soup.head) print(soup.p) """ 打印结果: <title>The Dormouse's story</title> <class 'bs4.element.Tag'> <head><title>The Dormouse's story</title></head> <p class="title" name="dromouse"><b>The Dormouse's story</b></p> """