在Python中删除除某个html标签及其内容以外的所有内容

Question

I've search around the internet and I cannot find anything that will exclude everything besides a certain tag and its content inside it.

How can I do this with Python (beautifulsoup 4)?

I have this html:

 <p><iframe width="1000" height="500" allowfullscreen="allowfullscreen" class="embed" src="#"> </iframe></p> <p>sdkjasdkljasldjad;j dadas dasdadada</p> 

I need to remove all other so the output is like this:

 <iframe width="1000" height="500" allowfullscreen="allowfullscreen" class="embed" src="#"> </iframe> 

I've come up with this but it don't know how to go further:

@register.filter(name='only_iframe')
def only_iframe(content):
    soup = BeautifulSoup(content)

    for tag in soup.find_all('p', 'strong'):
        tag.replaceWith('')

    return soup.get_text()

Answer 1

Why don't locate the iframe and get its string representation :

iframe = soup.find("iframe", class_="embed")
print(str(iframe))