python爬虫中抓取指数的实例讲解

有一些数据我们是没法直观的查看的，需要通过抓取去获得。听到指数这个词，有的小伙伴们觉得很复杂，似乎只在股票的时候才听说的，比如一些数据的涨跌分析都是比较棘手的问题。不过指数对于我们的数据分析还是很有帮助的，今天小编就python爬虫中抓取指数得方法给大家带来讲解。

刚好这几天需要用到这个爬虫，结果发现baidu指数的请求有点变化，所以就改了改：

import requests
import sys
import time
word_url = \'http://index.baidu.com/api/SearchApi/thumbnail?area=0&word={}\'
COOKIES = \'\'
headers = {
 \'Accept\': \'application/json, text/plain, */*\',
 \'Accept-Encoding\': \'gzip, deflate\',
 \'Accept-Language\': \'zh-CN,zh;q=0.9\',
 \'Cache-Control\': \'no-cache\',
 \'Cookie\': COOKIES,
 \'DNT\': \'1\',
 \'Host\': \'index.baidu.com\',
 \'Pragma\': \'no-cache\',
 \'Proxy-Connection\': \'keep-alive\',
 \'Referer\': \'http://index.baidu.com/v2/main/index.html\',
 \'User-Agent\': \'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.90 Safari/537.36\',
 \'X-Requested-With\': \'XMLHttpRequest\',
}
def decrypt(t,e):
 n = list(t)
 i = list(e)
 a = {}
 result = []
 ln = int(len(n)/2)
 start = n[ln:]
 end = n[:ln]
 for j,k in zip(start, end):
  a.update({k: j})
 for j in e:
  result.append(a.get(j))
 return \'\'.join(result)
  
def get_ptbk(uniqid):
 url = \'http://index.baidu.com/Interface/ptbk?uniqid={}\'
 resp = requests.get(url.format(uniqid), headers=headers)
 if resp.status_code != 200:
  print(\'获取uniqid失败\')
  sys.exit(1)
 return resp.json().get(\'data\')
def get_index_data(keyword, start=\'2011-01-03\', end=\'2019-08-05\'):
 keyword = str(keyword).replace(\"\'\", \'\"\')
 url = f\'http://index.baidu.com/api/SearchApi/index?area=0&word={keyword}&area=0&startDate={start}&endDate={end}\'
 resp = requests.get(url, headers=headers)
  print(\'获取指数失败\')
 content = resp.json()
 data = content.get(\'data\')
 user_indexes = data.get(\'userIndexes\')[0]
 uniqid = data.get(\'uniqid\')
 ptbk = get_ptbk(uniqid)
 while ptbk is None or ptbk == \'\':
  ptbk = get_ptbk(uniqid)
 all_data = user_indexes.get(\'all\').get(\'data\')
 result = decrypt(ptbk, all_data)
 result = result.split(\',\')
 print(result)
if __name__ == \'__main__\':
 words = [[{\"name\": \"酷安\", \"wordType\": 1}]]
get_index_data(words)

输出:

运行代码就可以得到我们想要的指数了，当然也可以用来看股票以及其他的一些操作，运用python爬虫解决都是不错的选择，感兴趣的小伙伴也可以跟着小编尝试一下。