Python Beautifulsoup：如何在不知道相应属性名称的情况下通过属性值查找标签？

Question

Let's assume we have an Attribute value "xyz" without knowing the Attribute Name. It means we could match

    <a href="xyz">

but also

    <div class="xyz">

Is it possible search for such tags?

Answer 1

One solution is using lambda in find_all function.

Example:

data = '''<a href="xyz">a</a>
<div class="somethingelse">b</div>
<div class="xyz">c</div>'''

from bs4 import BeautifulSoup
soup = BeautifulSoup(data, 'html.parser')

for tag in soup.find_all(lambda tag: any('xyz' in tag[a] for a in tag.attrs)):
    print(tag)

Prints:

<a href="xyz">a</a>
<div class="xyz">c</div>

Answer 2

[tag for tag in soup.find_all(True) 
    if "xyz" in tag.attrs.values() or ["xyz"] in tag.attrs.values()]

The explanation:

• soup.find_all(True) finds all tags (because True is for every tag evaluated to True ).

• tag.attrs is the dictionary of all attributes of the tag .

• We are not interested in tag attributes names (as href , class , id ), only in their values - so we use tag.attrs.values() .
• Some attributes are multi-valued (eg class="xy" ), so their value in the attrs dictionary is a list (eg ["x", "y"] ). So we test both "xyz" and ["xyz"] possibilities.