rt,python上使用requests尝试获取Note.ms源码，与浏览器所得不一致，是被防御了吗，那该怎么解决？获取到的源码，这是实际源码，打开F12，代码如下

import requests
headers = {"User-Agent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36'}
r = requests.get('https://note.ms/dcs',headers=headers);
print(r.text)
print('scrape ok')