美丽的汤错误：＆＃x27; nontype＆＃x27;对象没有属性＆＃x27; find_all＆＃x27;

Question

我遇到此错误：

---> 14 content = s.find_all('p')
AttributeError: 'NoneType' object has no attribute 'find_all'

在下面运行脚本时：

r = requests.get('https://www.marketsandmarkets.com/Market-Reports/rocket-missile-market-203298804.html/')
soup = BeautifulSoup(r.content, 'html.parser')
s = soup.find('div', class_='entry-content') 
content = s.find_all('p')
print(content)   

它适用于某些URL，但是对于其他URL，它给出了属性错误。不知道为什么会发生这种情况。

Answer 1

当soup.find找不到任何东西时，它将返回无。在中拨打s.find_all如果S：或not none：。

因此，您的代码变为：

r = requests.get('https://www.marketsandmarkets.com/Market-Reports/rocket-missile-market-203298804.html/')
soup = BeautifulSoup(r.content, 'html.parser')
s = soup.find('div', class_='entry-content') 
if s is not None:
    content = s.find_all('p')
    print(content) 
else:
    print("Didn't find what I was looking for...")

或也许：

content = s.find_all('p') if s is not None else []
print(content)

https://crummy.com/software /BeautifulSoup/bs4/doc/＃查找