如何从 Python 中的 rel 标记中提取 href 值

Question

...html...
<link rel="image_src" href="image.jpg" />
....more html....

How to extract the image url using BeautifulSoup in Python

Answer 1

Try this:

links = soup.find_all("link", {"rel": True})
for link in links:
    print(link.attrs["href"])

Answer 2

Use find() or find_all() for more items

for item in soup.find_all('link'): 
     print(item['href'])`

You can also use {href': True} to make sure that link will have href . And {'rel': 'image_src'} to make sure that it is link with image.

for item in soup.find_all('link', {'href': True, 'rel': 'image_src'}): 
     print(item['href'])`

---

Minimal working example

from bs4 import BeautifulSoup as BS

text = '''
    <link rel="image_src" />
    <link rel="image_src" href="image1.jpg" />
    <link rel="sound_src" href="hello.mp3" />
    <link rel="image_src" href="image2.jpg" />
'''

soup = BS(text, 'html.parser')

for item in soup.find_all('link', {'href': True, 'rel': "image_src"}):
    print(item['href'])

Answer 3

Try Css selector this.

soup.select_one('[rel="image_src"]')['href']

OR

 soup.select_one('link[rel="image_src"]')['href']

For multiple items.

for item in soup.select('[rel="image_src"]'):
    print(item['href'])

Answer 4

If soup is the BeautifulSoup object, then use

hrefs = [link['href'] for link in soup.find_all('link') if link.get('href') is not None]

Beware that there might not be a href attribute, and in that case, link['href'] will raise KeyError . This is why I used link.get('href') to check existence.