python 爬取标题时间来源为空，求指导

```python
import requests
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36'}
url = 'https://www.baidu.com/s?rtt=1&bsst=1&cl=2&tn=news&word=阿里巴巴'
res = requests.get(url, headers=headers).text

import re
p_href = '<h3 class="news-title_1YtI1"><a href="(.*?)"'
href = re.findall(p_href, res, re.S)
p_title = '<h3 class="news-title_1YtI1">.*?>(.*?)</a>'
title = re.findall(p_title, res, re.S)
p_date = '<span class="c-color-gray2 c-font-normal">(.*?)</span>'
date = re.findall(p_date, res)
p_source = '<span class="c-color-gray c-font-normal c-gap-right">(.*?)</span>'
source = re.findall(p_source, res)

for i in range(len(title)):
    title[i] = title[i].strip()
    title[i] = re.sub('<.*?>', '', title[i])
    print(str(i + 1) + '.' + title[i], source[i], date[i])
    print(href[i])

一直显示这个结果 也就是没有结果，有人能指导一下吗 ，谢谢

正则表达式写的不对。你把url贴到浏览器，获得结果后，在结果页面中右键查看源代码，找到你需要匹配的内容再去写正则来匹配