selenium模拟登陆+爬取数据

测试积点老人

1. from selenium import webdriver
   
2. from time import sleep
   
3. from selenium.webdriver.common.by import By
   
4. from lxml import etree
   
5. import requests
   
6. import time
   
7. headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36'}
   
8. 
   
9. driver = webdriver.Chrome()
   
10. driver.get('https://www.timeshighereducation.com/')
    
11. sleep(5)
    
12. 
    
13. driver.find_element(By.XPATH,'//div[@class="col-sm-12"]/div[@class="navbar-button__wrapper"]/ul/li/a[@title="User account"]').click()
    
14. sleep(5)
    
15. driver.find_element(By.XPATH,'//div[@class="region region-secondary-navigation"]/section/div/ul/li/a[@id="modal-login"]').click()
    
16. sleep(5)
    
17. 
    
18. sleep(5)
    
19. driver.switch_to.frame(driver.find_element(By.XPATH,'//div[@id="modal-content"]/iframe'))
    
20. 
    
21. driver.find_element(ByXPATH,'//input[@placeholder="Username or email"]').send_keys("123456")
    
22. driver.find_element(By.XPATH,'//input[@placeholder="Password"]').send_keys("123456")
    
23. # driver.refresh()
    
24. driver.find_element(By.XPATH,'//form[@class="user-login-form"]/div/input[@value="Log in"]').click()
    
25. sleep(5)
    
26. driver.switch_to.parent_frame
    
27. sleep(5)

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解析html字符串，获取需要的信息

1. def parse_html(html):
   
2. text = etree.HTML(html)
   
3. node_list = text.xpath('//tbody/tr[@class="odd row-1 js-row"]')
   
4. # print(node_list)
   
5. for i in node_list:
   
6.     try:
   
7.         # rank
   
8.         rank = i.xpath('/td[@class="rank sorting_1 sorting_2"]/text()')
   
9.         # name
   
10.         name = i.xpath('/td[@class=" name namesearch"]/a/text()')
    
11.         # region
    
12.         region = i.xpath('/td/div/div[@class="location"]/span/a/text()')
    
13.         #ratio
    
14.         # ratio = i.xpath('')
    
15.         # 构建json格式的字符串
    
16.         items = {
    
17.             "排名": rank,
    
18.             "名称": name,
    
19.             "地区/国家": region
    
20.         }
    
21.         print(items)
    
22.     except:
    
23.         pass
    
24. def main():
    
25. # 循环获取第0~15的网页源码，并解析
    
26. for page in range(0, 16):
    
27. # 每个网页的网址
    
28. url = 'https://www.timeshighereducation.com/world-university-rankings/2022#!/page/'+ str(page) + '/length/25/sort_by/rank/sort_order/asc/cols/stats'
    
29. # 爬取网页源码
    
30. html = requests.get(url, headers=headers).text
    
31. # 解析网页信息
    
32. parse_html(html)

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程序运行入口

1. if name == 'main':
   
2. main()

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为什么我爬不到数据，有没有能人赐教，本人初次接触

qqq911

下个断点调试

jingzizx

单步调试，

郭小贱

debug看看什么问题呢。