23-python用BeautifulSoup用抓取a标签内所有数据-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_39451578/article/details/97861753

本文介绍了如何使用Python的BeautifulSoup库解析HTML文档，提取特定标签及其属性，包括获取子标签和标签内的内容。通过实例展示了从div标签中抽取em标签，并获取a标签的各种属性。

1.获取子标签：

thr_msgs = soup.find_all('div',class_=re.compile('msg'))

for i in thr_msgs:

print(i)

first = i.select('em:nth-of-type(1)')

print(first)

>>>

<div class='\"msg\"'><em>佛山</em><em>1-3年</em><em>大专</em></div>

[<em>佛山</em>]

<div class='\"msg\"'><em>南京</em><em>3-5年</em><em>本科</em></div>

[<em>南京</em>]

<div class='\"msg\"'><em>南阳</em><em>1-3年</em><em>大专</em></div>

[<em>南阳</em>]

<div class='\"msg\"'><em>深圳</em><em>1年以内</em><em>本科</em></div>

[<em>深圳</em>]

2.过去一个标签内内容：

原文：https://blog.youkuaiyun.com/suibianshen2012/article/details/62040460?utm_source=copy

# -*- coding:utf-8 -*-
#python 2.7
#XiaoDeng
#http://tieba.baidu.com/p/2460150866
#标签操作


from bs4 import BeautifulSoup
import urllib.request
import re


#如果是网址，可以用这个办法来读取网页
#html_doc = "http://tieba.baidu.com/p/2460150866"
#req = urllib.request.Request(html_doc) 
#webpage = urllib.request.urlopen(req) 
#html = webpage.read()

 

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" id="xiaodeng"><!-- 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>;
<a href="http://example.com/lacie" class="sister" id="xiaodeng">Lacie</a>
and they lived at the bottom of a well.</p>
<p class="story">...</p>
"""
soup = BeautifulSoup(html, 'html.parser') #文档对象


#查找a标签,只会查找出一个a标签
#print(soup.a)#<a class="sister" href="http://example.com/elsie" id="xiaodeng"><!-- Elsie --></a>

for k in soup.find_all('a'):
print(k)
print(k['class'])#查a标签的class属性
print(k['id'])#查a标签的id值
print(k['href'])#查a标签的href值
print(k.string)#查a标签的string
#tag.get('calss')，也可以达到这个效果

　　37-python中bs4获取的标签中如何提取子标签