python爬虫动态网页爬取 报错

Question

import requests
import json
url = 'https://www.ptpress.com.cn/newsInfo/getCurrentAffairsForPortal'
return_data = requests.get(url).text
data = json.loads(return_data)
news = data['data']
for n in news:
    picPath=n['picPath']
    mainTitle= n['mainTitle']
    newsContent = n['newsContent']
    print("来源：",newsContent,'\n',"标题：",mainTitle,'\n',"图片：",picPath)
    print('\n')

import requests
import json
url = 'http://www.ptpress.com.cn/bookinfo/getBookListForWS'
return_data = requests.get(url).text    # 在需要爬取的URL网页进行HTTP请求
data = json.loads(return_data)        # 对HTTP响应的数据JSON化
news = data['data']                 # 索引到需要爬取的内容信息
for n in news:                     # 对索引出来的JSON数据进行遍历和提取
    newsContent = n['newsContent']
    mainTitle = n['mainTitle']
    price = n['price']
    print("新书名：",bookName,'\n',"作者：",author,'\n',"价格：",price)
    print('\n')

请问为什么最下面的可以爬出出来，而上面的爬取不出来 报错了
请问怎样修改上面的代码才可以爬取出来呢？
谢谢

Answer 1

news 数据获取错误

import requests
import json
url = 'https://www.ptpress.com.cn/newsInfo/getCurrentAffairsForPortal'
return_data = requests.get(url).text
data = json.loads(return_data)
news = data['data']['news4']
for n in news:
    picPath=n['picPath']
    mainTitle= n['mainTitle']
    newsContent = n['newsContent']
    print("来源：",newsContent,'\n',"标题：",mainTitle,'\n',"图片：",picPath)
    print('\n')