selenium获取动态网页信息（某东）-具体配置信息

需要安装的包:

selenium 
关于软件的驱动：
selenium之 驱动环境配置chrome、firefox、IE

 1 # encoding:utf-8
 2 # Author:"richie"
 3 # Date:8/16/2017
 4 
 5 import re,json
 6 from selenium import webdriver
 7 
 8 def spider(url):
 9     html = get_file(url)
10     com = re.compile(r'<li class="gl-item">.*?<div class="p-price">.*?<em>(?P<currency>.)</em><i>(?P<price>.*?)</i>'
11                      r'.*?<div class="p-name">.*?<em>(?P<name>.*?)</em>'
12                      r'.*?<div class="p-commit">.*?<strong>.*?<a.*?>(?P<comment_num>.*?)</a>', re.S)
13     for item in com.finditer(html):
14         yield {
15             "name": item.group("name"),
16             "currency": item.group("currency"),
17             "price": item.group("price"),
18             "comment_num": item.group('comment_num'),
19         }
20 
21 
22 def get_file(url):
23     try:
24         driver = webdriver.Chrome()
25         driver.get(url)
26         driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")
27         source = driver.page_source
28         driver.quit()
29         return source
30     except BaseException as e:
31         print(e)
32         return None
33 
34 if __name__ == '__main__':
35     for i in range(1,2):
36         page_url = "https://list.jd.com/list.html?cat=9987,653,655&ev=exprice_M1800L2500&page="+str(i)+"&sort=sort_rank_asc&trans=1&JL=6_0_0"
37         ret = spider(page_url)
38         f = open("jingdong.txt", "a",encoding='utf-8')
39         for obj in ret:
40             data = json.dumps(obj, ensure_ascii=False)
41             f.write(data + "
")
42         print("ok")