为什么在BS4中找到了BS4的发现，与Dict合作谁有双重侵犯论点？

Question

在此处输入图像描述 学习BS4和Findall（）没有使用DICE，并且使用两个Atribute标签。错误在哪里？因为它仅返回“绿色”标签，而没有“红色”。

from urllib.request import urlopen
from urllib.error import HTTPError
from bs4 import BeautifulSoup

URL = 'https://www.pythonscraping.com/pages/warandpeace.html'

def get_title(URL):
    try:
        html = urlopen(URL)
    except HTTPError as e:
        return None
    try:
        bsObj = BeautifulSoup(html.read())
        namelist = bsObj.findAll('span', {'class':'green', 'class':'red'})
    except AttributeError as e:
        return None
    return namelist
namelist = get_title(URL)
if namelist == None:
    print('we cant take title')
else:
    for name in namelist:
        print(name.get_text())

Answer 1

您可以导入re模块并使用以下内容：

import re

namelist = bsObj.findAll('span', {'class': re.compile(r"green|red")})