BeautifulSoup SoupStrainer应变html和pdf链接

Question

作为正则表达式模式，我需要传递什么才能从HTML网页中获取html和pdf？到目前为止，我的内容如下。我假设我需要使用OR语句，但这并没有按预期工作。

status, response = http.request("http://www.example.com")
htmlandpdfonly=SoupStrainer('a', href=re.compile('html|pdf'))
for link in BeautifulSoup(response, parseOnlyThese = htmlandpdfonly):
    if(link.has_key('href')):
        print link['href']

Answer 1

import re
from BeautifulSoup import BeautifulSoup

# find ".html" or ".pdf" in a string
match = re.compile('\.(html|pdf)')

# parse page content
status, response = http.request("http://www.example.com")
page = BeautifulSoup(response)

# check links
for link in page.findAll('a'):
    try:
        href = link['href']
        if re.search(match, href):
            print href
    except KeyError:
        pass