title: Python.Selenium. Can't find existing element. How switch frame
body: <p>I wand to get feedbacks from page 
  url = '<a href="https://ru.aliexpress.com/store/product/Gillette-Fusion-blade-4-pc/2671035_1000003578539.html?spm=2114.12010612.0.0.xL0ySy" rel="nofollow noreferrer">https://ru.aliexpress.com/store/product/Gillette-Fusion-blade-4-pc/2671035_1000003578539.html?spm=2114.12010612.0.0.xL0ySy</a>'</p>
  
  <p>I wait until page loaded. And I can find elements using Google Chrome inspector. But selenium can't find elements. And I alse can't find elements at the source page.</p>
  
  <p>How can i get feedbacks using selenium or other instruments?</p>
  
  <p>Here is my code:</p>
  
  <pre><code>from selenium import webdriver
  import time
  import csv
  import requests
  
  url = 'https://ru.aliexpress.com/store/product/Gillette-Fusion-blade-4-pc/2671035_1000003578539.html?spm=2114.12010612.0.0.xL0ySy'
  driver = webdriver.Chrome()
  driver.get(url)
  
  try:
      close_popup = driver.find_element_by_class_name('close-layer')
      close_popup.click()
  except:
      print("no alert")
  
  
  tab_feedback = driver.find_element_by_xpath('//*[@id="j-product-tabbed-pane"]/ul/li[2]')
  tab_feedback.click()
  time.sleep(8)
  try:
      text_feedback = driver.find_element_by_xpath('//*[@id="transction-feedback"]/div[4]/div[1]/div[2]/div[3]/dl')
      print(text_feedback.text)
  except:
      print("cant find by xpath")
  
  try:
      text_feedback = driver.find_element_by_class_name('buyer-feedback')
      print(text_feedback.text)
  except:
      print("cant find by class_name")
  
  
  try:
      text_feedback = driver.find_element_by_css_selector('div.f-content.dl.dt.span')
      print(text_feedback.text)
  except:
      print("cant find by css_selector")
  </code></pre>
  
  <p>it returns:</p>
  
  <pre><code>cant find by xpath
  cant find by class_name
  cant find by css_selector
  </code></pre>