title: Python - Can't download file after opening a new tab using selenium
body: <p>I need to download a xls file from a website using chrome and selenium. There are multiple websites I need to go and so I need to open new tabs. However, when I open the second tab, I cannot download the file I need. Below are simple version my code. Image that I have just download some file from one tab and then open a new one using <code>window.open()</code>:</p>
  
  <pre><code>import time
  from selenium import webdriver
  from selenium.webdriver.chrome.options import Options
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.common.by import By
  from selenium.webdriver.support import expected_conditions as EC
  
  options = webdriver.ChromeOptions() 
  prefs = {'download.default_directory' : SAVE_PATH, "download.prompt_for_download": False}
  options.add_experimental_option('prefs', prefs)
  driver = webdriver.Chrome(executable_path = DRIVE_PATH, chrome_options = options)
  
  driver.execute_script("window.open('https://www.fhfa.gov/DataTools/Downloads/Pages/House-Price-Index-Datasets.aspx#mpo');") 
  time.sleep(5)
  driver.switch_to.window(driver.window_handles[1]) 
  WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//*[@id='WebPartWPQ2']/div[1]/table[3]/tbody/tr[2]/td[2]/p/a"))).click()
  
  </code></pre>
  
  <p>Without opening new tab, I could download the file successfully. But after opening new tab, chrome tells me "Fail - Download error". Something wrong with my code?</p>