Python网络爬虫实战课时6 BeautifulSoup 基础操作（2）

最新推荐文章于 2023-05-23 19:13:19 发布

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本文介绍了如何使用Python的BeautifulSoup库解析HTML文档，包括选择指定ID的元素、选择具有特定类名的元素、获取所有a标签及其href属性。

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# -*- coding: UTF-8 -*-
from bs4 import BeautifulSoup
html_sample = ' \
<html> \
<body> \
<h1 id = "title">Hello World</h1> \
<a href ="#" class="link">this is link1</a> \
<a href = "# link2" Class = "link">This is link2</a> \
</body> \
</html>'

soup = BeautifulSoup(html_sample,'html.parser')
#使用select找到所有id为title的元素(id 前面需要加#) 一般id 为唯一元素
alink = soup.select('#title')

print(alink)

运行结果为：

[<h1 id="title">Hello World</h1>]

# -*- coding: UTF-8 -*-
from bs4 import BeautifulSoup
html_sample = ' \
<html> \
<body> \
<h1 id = "title">Hello World</h1> \
<a href ="#" class="link">this is link1</a> \
<a href = "# link2" Class = "link">This is link2</a> \
</body> \
</html>'

soup = BeautifulSoup(html_sample,'html.parser')
#使用selet 找到所有class为link的元素(class前面需要加.) (class一般多重复)
for link in soup.select('.link'):

print (link)

运行结果为：

print (link)

运行结果为：

# -*- coding: UTF-8 -*-
from bs4 import BeautifulSoup
html_sample = ' \
<html> \
<body> \
<h1 id = "title">Hello World</h1> \
<a href ="#" class="link">this is link1</a> \
<a href = "# link2" Class = "link">This is link2</a> \
</body> \
</html>'

soup = BeautifulSoup(html_sample,'html.parser')
#使用select找到所有a tag 的href 连结
alinks = soup.select( 'a' )
for link in alinks: