span标记-如何使用span标记对HTML上的数字求和

Question

我有一个URL，正试图通过span标记对其上的数字求和。有人能帮助修改下面的代码来做这样的事情吗？：(URL为：http://py4e-data.dr-chuck.net/comments_1050359.html)

from urllib.request import urlopen
from bs4 import BeautifulSoup
import ssl
# Ignore SSL certificate errors
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
url = input('Enter - ')
html = urlopen(url, context=ctx).read()
soup = BeautifulSoup(html, "html.parser")
# Retrieve all of the anchor tags
tags = soup('a')
for tag in tags:
# Look at the parts of a tag
print('TAG:', tag)
print('URL:', tag.get('href', None))
print('Contents:', tag.contents[0])
print('Attrs:', tag.attrs)

Answer 1

要对所有数字求和，您可以尝试以下操作：

tags = soup.find_all('span', class_ = 'comments')
total = sum([int(tag.text) for tag in tags])

完整代码：

from urllib.request import urlopen
from bs4 import BeautifulSoup
import ssl
# Ignore SSL certificate errors
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
url = 'http://py4e-data.dr-chuck.net/comments_1050359.html'
html = urlopen(url, context=ctx).read()
soup = BeautifulSoup(html, "html.parser")
tags = soup.find_all('span', class_ = 'comments')
total = sum([int(tag.text) for tag in tags])
print(total)

输出：

2692