如何从div中的a标签获取href

Question

我正在使用beautifulsoup，有些我无法在a 标签中提取href，无论我做什么，它都会向我返回错误。这是我正在使用的功能

def scrape_a(url):
  r = requests.get(url)
  soup = BeautifulSoup(r.content)
  news =  soup.find_all("div", attrs={"class": "news"})
  return news

html数据结构是

<div class="news">
<a href="www.link.com">
<h2 class="heading">
Kenyan police foil potential bomb attack in Nairobi mall 
</h2>
<div class="teaserImg">
<img alt="" border="0" height="124" src="/image">
</div>
<p> text </p>
</a>
</div>

我想从中提取的是 href 和 h2 class='heading'，每当我尝试获取这两者时，我都会得到一个错误，none type object has no attribute get item

Answer 1

这样的事情怎么样？

from bs4 import BeautifulSoup

def get_news_class_hrefs(html):
    """
    Finds all urls pointed to by all links inside
    'news' class div elements
    """
    soup = BeautifulSoup(html, 'html.parser')
    links = [a['href'] for div in soup.find_all("div", attrs={"class": "news"}) for a in div.find_all('a')]
    return links

# example html copied from question
html="""<div class="news">
<a href="www.link.com">
<h2 class="heading">
Kenyan police foil potential bomb attack in Nairobi mall 
</h2>
<div class="teaserImg">
<img alt="" border="0" height="124" src="/image">
</div>
<p> text </p>
</a>"""

get_news_class_hrefs(html)
# Output:
# [u'www.link.com']