Question

给出html页面源，例如：

<html>
  <head></head>
  <body>
    <p><nobr><a href="...">Some link text</a></nobr><p>
  </body>
</html>

并且没有明确知道哪些标签包裹着<a>元素（可能是任何东西，而不仅仅是nobr）。我该如何创建一个循环，以不断解开给定<a>标记的父项，直到其父项是一个段落？

类似的东西：

import urllib3
from bs4 import BeautifulSoup as bs

http = urllib3.PoolManager()
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

page = "https://www.snopes.com/fact-check/rebuilding-iraq/"
link="http://www.elca.org/ScriptLib/OS/Congregations/cdsDetail.asp?congrno=12962"

r = http.request('get', page)
body = r.data
soup = bs(body, 'lxml')
a = soup.find('a', href=link)

while True:
    if a.parent.name == "p":
        break
    else:
        a.parent.name.unwrap() #doesnt work as name is string
print(soup)

Answer 1

对给定的子标记使用find_parents。

import requests
from bs4 import BeautifulSoup
page = "https://www.snopes.com/fact-check/rebuilding-iraq/"
link="http://www.elca.org/ScriptLib/OS/Congregations/cdsDetail.asp?congrno=12962"

r = requests.get(page)
soup = bs(r.content, 'lxml')
a = soup.find('a', href=link)

for tag in a.find_parents('p'):
    print(tag)

输出：

<p><font class="copyright_text_color" color="" face=""><b>Origins:</b></font>   This item is “true” in the sense that Eric Rydbom is indeed an engineer stationed in Iraq with the Army’s <nobr>4th Infantry</nobr> Division, and he sends monthly <nobr>e-mail</nobr> dispatches such as the one quoted above to fellow members of his congregation at the <nobr><a href="http://www.elca.org/ScriptLib/OS/Congregations/cdsDetail.asp?congrno=12962" target="_blank">First Lutheran</a></nobr> Church of Richmond Beach in Shorline, Washington.  This piece was one of those messages, forwarded to the church’s prayer chain and thence to the larger world via the Internet.</p>

如果要获取文字，请使用。

for tag in a.find_parents('p'):
    print(tag.text)

Answer 2

使用bs4 4.7.1的简便方法。是使用：has和一个属性=值选择器。无需循环。

import requests
from bs4 import BeautifulSoup as bs

page = "https://www.snopes.com/fact-check/rebuilding-iraq/"
link="http://www.elca.org/ScriptLib/OS/Congregations/cdsDetail.asp?congrno=12962"
r = requests.get(page)
soup = bs(r.content, 'lxml')
print(soup.select_one('p:has([href="' + link + '"])'))

如何用漂亮的汤解开父母

2 个答案:

输出：