**老师您好，我发现B站不用滑块，然后豆瓣在用 我就修改了课程代码，代码如下，然后我发现图片抓取的是上面那张灰色的，没有抓取到下面真正的图片，不知道怎么解决，希望老师帮忙看下

import time
from io import BytesIO
import random

import requests
from selenium import webdriver
from selenium.webdriver import ActionChains
from PIL import Image

url = “https://www.douban.com/”

browser = webdriver.Chrome(executable_path=r"C:\Users\XUEJINHU\Desktop\编程\python\配件\chromedriver_win32\chromedriver.exe")

#2. 点击元素显示出有缺口的图片并下载
#3. 对比两张图片找出缺口的移动像素
#4. 拖动元素

url = “https://www.douban.com/”

def compare_pixel(image1, image2, i, j):
#判断两个像素是否相同
pixel1 = image1.load()[i, j]
pixel2 = image2.load()[i, j]

threshold = 60

if abs(pixel1[0] - pixel2[0]) < threshold and abs(pixel1[1] - pixel2[1]) < threshold and abs(pixel1[2] - pixel2[2]) < threshold:
    return True
return False

def crop_image(image_file_name):
#截图验证码图片
#定位某个元素在浏览器中的位置
time.sleep(2)
img = browser.find_element_by_xpath(’//*[@class=“tc-imgarea drag”]/div[@id=“slideBgWrap”]/img’)
time.sleep(2)

location = img.location
print("图片的位置", location)
size = img.size

top, buttom, left, right = location["y"], location["y"]+size["height"], location["x"], location['x'] + size["width"]
print("验证码位置", left,top, right, buttom)
screenshot = browser.get_screenshot_as_png()
screenshot = Image.open(BytesIO(screenshot))
captcha = screenshot.crop((int(left),int(top), int(right), int(buttom)))
captcha.save(image_file_name)
return captcha

def login():
username = "19818509172"
password = “1111111”

browser.get(url)
browser.maximize_window() #很重要！！
time.sleep(0.5)

browser.switch_to.frame(browser.find_element_by_tag_name("iframe"))

log_ele = browser.find_element_by_xpath('/html/body/div[1]/div[1]/ul[1]/li[2]').click()
time.sleep(0.5)

username_ele = browser.find_element_by_xpath('//*[@id="username"]')
password_ele = browser.find_element_by_xpath('//*[@id="password"]')
username_ele.send_keys(username)
password_ele.send_keys(password)

click_ele = browser.find_element_by_xpath('/html/body/div[1]/div[2]/div[1]/div[5]/a').click()
time.sleep(4)

browser.switch_to.frame(browser.find_element_by_xpath('//*[@id="tcaptcha_iframe"]'))

slider = browser.find_element_by_xpath('//*[@id="tcaptcha_drag_thumb"]')
ActionChains(browser).move_to_element(slider).perform()

#如果截取图片
image1 = crop_image("captcha1.png")




#获取缺口图片
ActionChains(browser).click_and_hold(slider).perform()

if name == “main”:
login()