如何使用 Selenium 在 Instagram 弹出框架中向下滚动

Question

我有一个 python 脚本，使用 selenium 转到给定的 Instagram 个人资料并遍历用户的关注者。在 instagram 网站上，当单击查看关注者列表时，会打开一个弹出窗口，其中列出了列出的帐户（这是该网站的屏幕截图）

然而，无论是在视觉上还是在 html 中，都只显示了 12 个帐户。为了看到更多，必须向下滚动，所以我尝试使用 Keys.PAGE_DOWN 输入来执行此操作。

from selenium import webdriver

from selenium.common.exceptions         import TimeoutException

from selenium.webdriver.support.ui      import WebDriverWait 

from selenium.webdriver.support         import expected_conditions as EC

from selenium.webdriver.chrome.options  import Options

from selenium.webdriver.common.keys     import Keys

import time 

...

username = 'Username'

password = 'Password'

message  = 'blahblah'

tryTime  = 2

#create driver and log in

driver = webdriver.Chrome()

logIn(driver, username, password, tryTime)

#gets rid of preference pop-up

a = driver.find_elements_by_class_name("HoLwm")

a[0].click()

#go to profile

driver.get("https://www.instagram.com/{}/".format(username))

#go to followers list

followers = driver.find_element_by_xpath("//a[@href='/{}/followers/']".format(username))

followers.click()

time.sleep(tryTime) 

#find all li elements in list

fBody  = driver.find_element_by_xpath("//div[@role='dialog']")

fBody.send_keys(Keys.PAGE_DOWN) 

fList  = fBody.find_elements_by_tag("li")

print("fList len is {}".format(len(fList)))

time.sleep(tryTime)

print("ended")

driver.quit()

当我尝试运行它时，出现以下错误：

Message: unknown error: cannot focus element

我知道这可能是因为我为 使用了错误的元素fBody，但我不知道哪个是正确的。有谁知道我应该将 PAGE_DOWN 键发送到哪个元素，或者是否有另一种加载帐户的方法？

任何帮助深表感谢！

Answer 1

如果在 range(1, 4) 中为 i 的范围添加迭代 (for)，则上述代码工作正常：尝试：&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; #find all li elements in list&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; fBody&nbsp; = self.driver.find_element_by_xpath("//div[@class='isgrP']")&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; scroll = 0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; while scroll < 5: # scroll 5 times&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; self.driver.execute_script('arguments[0].scrollTop = arguments[0].scrollTop + arguments[0].offsetHeight;', fBody)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; time.sleep(2)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; scroll += 1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; fList&nbsp; = self.driver.find_elements_by_xpath("//div[@class='isgrP']//li")&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; print("fList len is {}".format(len(fList)))&nbsp; &nbsp; &nbsp; &nbsp; except Exception as e:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; print(e, "canot scrol")&nbsp; &nbsp; &nbsp; &nbsp; try:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; #get tags with a&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hrefs_in_view = self.driver.find_elements_by_tag_name('a')&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; # finding relevant hrefs&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hrefs_in_view = [elem.get_attribute('title') for elem in hrefs_in_view]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [pic_hrefs.append(title) for title in hrefs_in_view if title not in pic_hrefs]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; print("Check: pic href length " + str(len(pic_hrefs)))&nbsp; &nbsp; &nbsp; &nbsp; except Exception as tag:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; print(tag, "can not find tag")因此，即使 while 循环未命中，for 循环也可以滚动