title: Python Selenium, check the existence of a class in WhatsappWeb
body: <p>I'm trying to build a code to check if a phone number exists or not and I'm using WhatsappWeb and Selenium to do so.</p>
  
  <p><strong>I'm trying the following script:</strong></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>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.common.by import By
  import time
  from selenium.common.exceptions import NoSuchElementException
  
  driver = webdriver.Chrome(r'C:\Users\Martin\Desktop\Python Project\whatsappsms\chromedriver_win32\chromedriver')
  
  driver.implicitly_wait(15)
  
  driver.get('https://web.whatsapp.com')
  time.sleep(5)
  
  
  driver.execute_script("window.open('');")
  
  driver.switch_to.window(driver.window_handles[1])
  
  driver.get('https://api.whatsapp.com/send?phone=355692020202')
  
  driver.find_element_by_xpath('// *[ @ id = "action-button"]').click()
  
  driver.find_element_by_xpath('// *[ @ id = "fallback_block"] / div / div / a').click()
  
  time.sleep(2)
  
  if
  driver.find_element_by_xpath('/html/body/div[1]/div/div/div[4]/div/header/div[2]/div[1]/div/span').get_attribute('innerHTML') == '+355 69 202 0202':
      
  print("script executed, number exists")
  
  else:
      pass
  
  
  class_EL= driver.find_elements_by_class_name('_3lLzD')
  
  for i in class_EL:
  
      if (i.get_attribute('innerHTML')) == 'Phone number shared via url is invalid.':
  
          print("script executed, number does not exist")
  
      else:
          pass </code></pre>
  </div>
  </div>
  </p>
  
  <p>From my point of view it will show the popup modal class if the number does not exist and it will go to the chat page if the number exists, but cant find a way to link both conditions. </p>
  
  <p>Thanks in advance </p>