笔记-python 中BeautifulSoup入门-优快云博客

本文链接：https://blog.youkuaiyun.com/java2508/article/details/139641211

在前面的例子用，我用了BeautifulSoup来从58同城抓取了手机维修的店铺信息，这个库使用起来的确是很方便的。本文是BeautifulSoup 的一个详细的介绍，算是入门把。文档地址：http://www.crummy.com/software/BeautifulSoup/bs4/doc/

什么是BeautifulSoup？

Beautiful Soup 是用Python写的一个HTML/XML的解析器，它可以很好的处理不规范标记并生成剖析树(parse tree)。它提供简单又常用的导航（navigating），搜索以及修改剖析树的操作。它可以大大节省你的编程时间。

直接看例子：

#!/usr/bin/python# -*- coding: utf-8 -*-

from bs4 import BeautifulSoup

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>

"""

soup = BeautifulSoup(html_doc)

print soup.title

print soup.title.name

print soup.title.string

print soup.p

print soup.a

print soup.find_all('a')

print soup.find(id='link3')

print soup.get_text()

结果为：

<title>The Dormouse's story</title>
title
The Dormouse's story
<p class="title"><b>The Dormouse's story</b></p>
<a class="sister" href="http://example.com/elsie" id="link1">Elsie</a>
[<a