利用python如何爬取js里面的内容

import requests
from bs4 import BeautifulSoup

res = requests.get('http://news.sina.com.cn/c/nd/2017-06-12/doc-ifyfzhac1650783.shtml')
res.encoding = 'utf-8'
soup = BeautifulSoup(res.text,'html.parser')
#取评论数
commentCount = soup.select_one('#commentCount1')
print(commentCount.text)

import json
comments = requests.get('http://comment5.news.sina.com.cn/page/info?version=1&format=js&channel=gn&newsid=comos-fyfzhac1650783')
comments.encoding = 'utf-8'
print(comments)
jd = json.loads(comments.text.strip('var data=')) #移除改var data=将其变为json数据
print(jd['result']['count']['total'])