网站对分析器隐藏页脚

我想在网站上找到捐款按钮 The University of British Columbia .

捐款按钮位于页脚,在分类为“span7”的div中

然而,当被刮擦时,html将div与没有任何内容的div合并。

我的程序以direct div作为源运行得很好:

from bs4 import BeautifulSoup as bs
import re

site = '''<div class="span7" id="ubc7-footer-menu"><div class="row-fluid"><div class="span6"><h3>About UBC</h3><div><a href="https://cdn.ubc.ca/clf/ref/contact">Contact UBC</a></div><div><a href="https://cdn.ubc.ca/clf/ref/about">About the University</a></div><div><a href="https://cdn.ubc.ca/clf/ref/news">News</a></div><div><a href="https://cdn.ubc.ca/clf/ref/events">Events</a></div><div><a href="https://cdn.ubc.ca/clf/ref/careers">Careers</a></div><div><a href="https://cdn.ubc.ca/clf/ref/gift">Make a Gift</a></div><div><a href="https://cdn.ubc.ca/clf/ref/search">Search UBC.ca</a></div></div><div class="span6"><h3>UBC Campuses</h3><div><a href="https://cdn.ubc.ca/clf/ref/vancouver">Vancouver Campus</a></div><div><a href="https://cdn.ubc.ca/clf/ref/okanagan">Okanagan Campus</a></div><h4>UBC Sites</h4><div><a href="https://cdn.ubc.ca/clf/ref/robson">Robson Square</a></div><div><a href="https://cdn.ubc.ca/clf/ref/centre-for-digital-media">Centre for Digital Media</a></div><div><a href="https://cdn.ubc.ca/clf/ref/medicine">Faculty of Medicine Across BC</a></div><div><a href="https://cdn.ubc.ca/clf/ref/asia">Asia Pacific Regional Office</a></div></div></div></'''

html = bs(site, 'html.parser')
link = html.find('a', string=re.compile('(?)(donate|donation|gift)')) 

#returns proper donation URL

但是,使用站点不起作用

from bs4 import BeautifulSoup as bs
import requests
import re

site = requests.get('https://www.ubc.ca/')

html = bs(site.content, 'html.parser')
link = html.find('a', string=re.compile('(?i)(donate|donation|gift)')) 

#returns none

我的解析器有问题吗?这是某种反刮策略吗?我注定了吗?