如何找到所有的评论与美丽的汤 [英] How to find all comments with Beautiful Soup
问题描述
这个问题是在四年前提出的，但现在的答案是过时的BS4。
This question was asked four years ago, but the answer is now out of date for BS4.
我想使用美丽的汤删除我的html文件中的所有评论。由于BS4会将每个评论视为特殊类型的导航字符串，我认为这段代码可以工作：
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()
我找到使用BS4的所有注释？
So that didn't work.... How do I find all comments using BS4?
推荐答案
你可以传递一个函数find_all评论。
You can pass a function to find_all() to help it check whether the string is a Comment.
例如我有下面的html：
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>
代码：
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.decompose()
输出将是：
Branding and main navigation
============
test comment here
============
BTW，我想原因 find_all（'Comment'）不工作是（从BeautifulSoup文档）：
BTW, I think the reason why find_all('Comment') doesn't work is (from BeautifulSoup document):
名字，你会告诉美丽的汤只考虑具有某些名称的标签。 文本字符串将被忽略，其名称不匹配的标记。
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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