python解析库

发布时间：2020-12-20 12:55:28 所属栏目：Python 来源：网络整理

导读：BeautifulSoup示例： #!/usr/bin/env python# -*- coding: utf-8 -*-# author: imcatihtml_doc = """ html head title The Dormouse‘s story / title / head body p class ="title" b The Dormouse‘s story / b b 123 / b / p p class ="story" Once upon

BeautifulSoup示例：

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

html_doc = """
<html><head><title>The Dormouse‘s story</title></head>
<body>
<p class="title"><b>The Dormouse‘s story</b><b>123</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>
"""
from bs4 import BeautifulSoup
soup = BeautifulSoup(html_doc,‘html.parser‘)
#格式化输出对象内容
#print(soup.prettify())
#根据标签名获取整个标签，取第一个值
print(soup.a)
#获取标签的名字
print(soup.title.name)
#获取标签中的文本
print(soup.title.string)
#获取title标签的父标签
print(soup.title.parent.name)
#获取p标签的子标签
print(soup.p.contents)
#获取标签的属性值(两种方式)
print(soup.p["class"])
print(soup.p.attrs["class"])
#使用select、css选择器 类名前加.,id名前加#
print(soup.select("a"))
print(soup.select(".title"))
#获取内容
print(soup.select(".title")[0])
print(soup.select(".title")[0].get_text())
#获取属性值
print(soup.select(".title")[0].attrs["class"])
#获取p下面的子标签内容
print(soup.select(‘p > b‘)[1].get_text())
#使用find、findall进行查找 find返回第一个查找结果，find_all返回所有查找结果
print(soup.find(‘p‘,attrs={"class":"title"}))
print(soup.find_all(‘p‘,attrs={"class":"title"}))

输出：
<a class="sister" href="http://example.com/elsie" id="link1">Elsie</a> 
title
The Dormouse‘s story
head
[<b>The Dormouse‘s story</b>,<b>123</b>]
[‘title‘]
[‘title‘]
[<a class="sister" href="http://example.com/elsie" id="link1">Elsie</a>,<a class="sister" href="http://example.com/lacie" id="link2">Lacie</a>,<a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>]
[<p class="title"><b>The Dormouse‘s story</b><b>123</b></p>]
<p class="title"><b>The Dormouse‘s story</b><b>123</b></p>
The Dormouse‘s story123
[‘title‘]
123
<p class="title"><b>The Dormouse‘s story</b><b>123</b></p>
[<p class="title"><b>The Dormouse‘s story</b><b>123</b></p>]

（编辑：李大同）

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