Python 在beautifulSoup中按位置选择多个标记_Python_Beautifulsoup

Python 在beautifulSoup中按位置选择多个标记

python

Python 在beautifulSoup中按位置选择多个标记,python,beautifulsoup,Python,Beautifulsoup,考虑以下html： html_doc = """ <html><head><title>The Dormouse's story</title></head> <body> The Dormouse's story Once upon a time there were th

考虑以下html：

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/tillie" class="sister" id="link3">Millie</a>
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</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 = bs4.BeautifulSoup(html_doc, 'html.parser')

但是，如果我想选择第二、第三和第五个a标签，我该怎么做？我试着用下面的方法，这给了我错误

soup.select（“类型的第n个（[2,3,5]））
选择（“类型（2,3,5）的第n个”）

如果你的解决方案不是围绕CSS类，你最好使用

soup.find_all（）

使用带有逗号的CSS选择器“

”，“

：

“a:n子项（2）、a:n子项（3）、a:n子项（5）”

：

导入请求
从bs4导入BeautifulSoup
html_doc=“”
睡鼠的故事
睡鼠的故事
从前有三个小姐妹，她们的名字是
,
和
;
他们住在井底

"""
soup=BeautifulSoup（html_doc，'html.parser'）
a2、a3、a5=汤。选择（'a:n个孩子（2），a:n个孩子（3），a:n个孩子（5）'
印刷品（a2）
印刷品（a3）
印刷品（a5）

印刷品：

<a class="sister" href="http://example.com/tillie" id="link3">Millie</a>
<a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>
<a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>

更多信息：

这不起作用，我在扫描字符串文字错误时得到一个下线

import requests
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/tillie" class="sister" id="link3">Millie</a>
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</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, 'html.parser')

a2, a3, a5 = soup.select('a:nth-child(2), a:nth-child(3), a:nth-child(5)')

print(a2)
print(a3)
print(a5)

<a class="sister" href="http://example.com/tillie" id="link3">Millie</a>
<a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>
<a class="sister" href="http://example.com/tillie" id="link3">Tillie</a>