selenium模拟登陆+爬取数据
from selenium import webdriverfrom time import sleep
from selenium.webdriver.common.by import By
from lxml import etree
import requests
import time
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'}
driver = webdriver.Chrome()
driver.get('https://www.timeshighereducation.com/')
sleep(5)
driver.find_element(By.XPATH,'//div[@class="col-sm-12"]/div[@class="navbar-button__wrapper"]/ul/li/a[@title="User account"]').click()
sleep(5)
driver.find_element(By.XPATH,'//div[@class="region region-secondary-navigation"]/section/div/ul/li/a[@id="modal-login"]').click()
sleep(5)
sleep(5)
driver.switch_to.frame(driver.find_element(By.XPATH,'//div[@id="modal-content"]/iframe'))
driver.find_element(ByXPATH,'//input[@placeholder="Username or email"]').send_keys("123456")
driver.find_element(By.XPATH,'//input[@placeholder="Password"]').send_keys("123456")
# driver.refresh()
driver.find_element(By.XPATH,'//form[@class="user-login-form"]/div/input[@value="Log in"]').click()
sleep(5)
driver.switch_to.parent_frame
sleep(5)解析html字符串，获取需要的信息def parse_html(html):
text = etree.HTML(html)
node_list = text.xpath('//tbody/tr[@class="odd row-1 js-row"]')
# print(node_list)
for i in node_list:
try:
# rank
rank = i.xpath('/td[@class="rank sorting_1 sorting_2"]/text()')
# name
name = i.xpath('/td[@class=" name namesearch"]/a/text()')
# region
region = i.xpath('/td/div/div[@class="location"]/span/a/text()')
#ratio
# ratio = i.xpath('')
# 构建json格式的字符串
items = {
"排名": rank,
"名称": name,
"地区/国家": region
}
print(items)
except:
pass
def main():
# 循环获取第0~15的网页源码，并解析
for page in range(0, 16):
# 每个网页的网址
url = 'https://www.timeshighereducation.com/world-university-rankings/2022#!/page/'+ str(page) + '/length/25/sort_by/rank/sort_order/asc/cols/stats'
# 爬取网页源码
html = requests.get(url, headers=headers).text
# 解析网页信息
parse_html(html)
程序运行入口
if name == 'main':
main()为什么我爬不到数据，有没有能人赐教，本人初次接触
下个断点调试 单步调试， debug看看什么问题呢。
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