如何使用 Beautiful Soup 查找所有评论 [英] How to find all comments with Beautiful Soup
问题描述
这个问题是四年前问的，但是BS4 的答案现在已经过时了.
我想用美丽的汤删除我的 html 文件中的所有评论.由于 BS4 将每个 评论作为一种特殊类型的可导航的字符串，我认为这段代码可以工作:
用于soup.find_all('comment') 中的注释:评论.分解()所以这不起作用....我如何使用 BS4 找到所有评论?
你可以给 find_all() 传递一个函数来帮助它检查字符串是否为 Comment .
例如我有以下 html:
<!-- 品牌和主导航--><div class="Branding">The Science &您最喜欢的产品背后的安全性</div><div class="l-branding"><p>只是一个品牌</p><!-- 在这里测试评论--><div class="block_content"><a href="https://www.google.com">Google</a>
代码:
from bs4 import BeautifulSoup as BS从 bs4 导入评论....汤 = BS(html, 'html.parser')评论 = 汤.find_all(string=lambda text: isinstance(text, Comment))对于 c 评论:打印(c)打印(============)c.extract()输出将是:
品牌和主导航============测试评论在这里============顺便说一句，我认为 find_all('Comment') 不起作用的原因是(来自 BeautifulSoup 文档):
传入 name 的值，您将告诉 Beautiful Soup 仅考虑具有特定名称的标签.文本字符串将被忽略，名称不匹配的标签也将被忽略.
This question was asked four years ago, but the answer is now out of date for BS4.
I want to delete all comments in my html file using beautiful soup. Since BS4 makes each comment as a special type of navigable string, I thought this code would work:
for comments in soup.find_all('comment'):
comments.decompose()
So that didn't work.... How do I find all comments using BS4?
You can pass a function to find_all() to help it check whether the string is a Comment.
For example I have below html:
<body>
<!-- Branding and main navigation -->
<div class="Branding">The Science & Safety Behind Your Favorite Products</div>
<div class="l-branding">
<p>Just a brand</p>
</div>
<!-- test comment here -->
<div class="block_content">
<a href="https://www.google.com">Google</a>
</div>
</body>
Code:
from bs4 import BeautifulSoup as BS
from bs4 import Comment
....
soup = BS(html, 'html.parser')
comments = soup.find_all(string=lambda text: isinstance(text, Comment))
for c in comments:
print(c)
print("===========")
c.extract()
the output would be:
Branding and main navigation
============
test comment here
============
BTW, I think the reason why find_all('Comment') doesn't work is (from BeautifulSoup document):
Pass in a value for name and you’ll tell Beautiful Soup to only consider tags with certain names. Text strings will be ignored, as will tags whose names that don’t match.
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