title: WebDriverWait failure to waiting for that URL
body: <p>WebDriverWait failure to waiting for that URL, and the waiting tag information as following :</p>
  
  <pre><code>class="iw_component" id="c1417094965155"
  </code></pre>
  
  <p>prompt the error messages <code>"selenium.common.exceptions.TimeoutException: "</code> from the following code:</p>
  
  <pre><code>from pyvirtualdisplay import Display
  from selenium import webdriver
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  
  display=Display(visible=0,size=(800,800))
  display.start()
  
  driver = webdriver.Firefox()
  driver.get("url")
  try:
      element = WebDriverWait(driver, 20).until(
           EC.presence_of_element_located((By.CLASS_NAME, "iw_component"))
  )
  finally:
      driver.quit()
      display.stop()
  </code></pre>