BeautifulSoup是一个用于从HTML和XML文件中提取数据的python库，它提供一些简单的函数来处理导航、搜索、修改分析树等功能。BeautifulSoup能自动将文档转换成Unicode编码，输出文档转换为UTF-8编码。
本例直接创建模拟HTML代码，进行美化：
# 导入BeautifulSoup库 from bs4 import BeautifulSoup # 创建模拟HTML代码的字符串 html_doc = """ <html><head><title>The Dormouse‘s story</title></head> <body> <p class="title"><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" id="link1">Elsie</a>, <a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and <a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>; and they lived at the bottom of a well.</p> <p class="story">...</p> """ # 创建一个BeautifulSoup对象，获取页面正文 soup = BeautifulSoup(html_doc, features="lxml") # 打印解析的HTML代码 print(‘经BeautifulSoup美化的代码：‘,soup) print(‘===================================‘) print(‘通过prettify()方法进行代码的格式化处理：‘,soup.prettify())
结果：
经BeautifulSoup美化的代码： <html><head><title>The Dormouse‘s story</title></head> <body> <p class="title"><b>The Dormouse‘s story</b></p> <p class="story">Once upon a time there were three little sisters; and their names were <a class="sister" href="http://example.com/elsie" id="link1">Elsie</a>, <a class="sister" href="http://example.com/lacie" id="link2">Lacie</a> and <a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>; and they lived at the bottom of a well.</p> <p class="story">...</p> </body></html> =================================== 通过prettify()方法进行代码的格式化处理： <html> <head> <title> The Dormouse‘s story </title> </head> <body> <p class="title"> <b> The Dormouse‘s story </b> </p> <p class="story"> Once upon a time there were three little sisters; and their names were <a class="sister" href="http://example.com/elsie" id="link1"> Elsie </a> , <a class="sister" href="http://example.com/lacie" id="link2"> Lacie </a> and <a class="sister" href="http://example.com/tillie" id="link3"> Tillie </a> ; and they lived at the bottom of a well. </p> <p class="story"> ... </p> </body> </html>
原文：https://www.cnblogs.com/xiao02fang/p/12933835.html