title: python selenium 'send_keys' is not consistently functioning
body: <p>I have a script that will open eBay and automate the buying process, and it works… for a while. After a series of loops, it randomly starts to skip sending data to text fields. The script will always runs perfectly the first time, but sporadically between the 2nd or 10th iteration,it will break; it hasn’t gotten past the 10th loop so far.</p>
  
  <p>I'm using Python 2.7, Chrome 47 (with the chrome driver), and Selenium 2.53.5.</p>
  
  <p>Here’s part of my code:</p>
  
  <pre><code>for o in orders:
  if (o[1] == "Batteries"):
      driver.get("http://www.ebay.com/itm/20-Piece-Combo-Pack-Duracell-Duralock-10-AA-and-10-AAA-Size-Batteries-EXP-2025/272003416650?_trksid=p2045573.c100505.m3226&amp;_trkparms=aid%3D555014%26algo%3DPL.DEFAULT%26ao%3D1%26asc%3D36866%26meid%3D1ff8810857444e0aa548e1aecb205110%26pid%3D100505%26rk%3D1%26rkt%3D1%26")
  
  wait.until(EC.presence_of_element_located((By.CLASS_NAME, 'qtyInput')))
  input_field = driver.find_element_by_name('quantity')
  input_field.clear()
  input_field.send_keys(o[0])
  driver.find_element_by_id('binBtn_btn').click()
  #GUESTCHECKOUT
  wait.until(EC.presence_of_element_located((By.ID, 'gtChk')))
  driver.find_element_by_id('gtChk').click()
  
  driver.switch_to_frame(driver.find_element_by_tag_name("iframe"))
  wait.until(EC.presence_of_element_located((By.ID, 'confirmEmail')))
  
  t = list(pycountry.countries)
  for country in t:
      if(o[7] == country.alpha2):
          o[7] = country.name
  
  Select(driver.find_element_by_name('country')).select_by_visible_text(o[7])
  driver.find_element_by_name('firstName').send_keys(name[0])
  driver.find_element_by_name('lastName').send_keys(o[2])
  
  driver.find_element_by_name('address1').send_keys(o[3])
  
  driver.find_element_by_name('city').send_keys(o[4])
  
  Select(driver.find_element_by_name('state')).select_by_value(o[6])
  driver.find_element_by_name('zip').send_keys(o[5])
  
  driver.find_element_by_name('dayphone1').send_keys("123")
  driver.find_element_by_name('dayphone2').send_keys("456")
  driver.find_element_by_name('dayphone3').send_keys("7890")
  
  driver.find_element_by_name('email').send_keys("d@gmail.com")
  driver.find_element_by_name('confirmEmail').send_keys("d@gmail.com")
  </code></pre>
  
  <blockquote>
    <p>Traceback (most recent call last): File "autoBuyer.py", line 267, in
     driver.find_element_by_name('lastName').send_keys(name[1])
    File "/Library/Python/2.7/site-packages/selenium-2.53.5-<br>
    py2.7.egg/selenium/webdriver/remote/webelement.py", line 321, in
    send_keys self._execute(Command.SEND_KEYS_TO_ELEMENT, {'value':<br>
    keys_to_typing(value)}) File
    "/Library/Python/2.7/site-packages/selenium-2.53.5-<br>
    py2.7.egg/selenium/webdriver/remote/webelement.py", line 456, in
    _execute return self._parent.execute(command, params) File "/Library/Python/2.7/site-packages/selenium-2.53.5- 
    py2.7.egg/selenium/webdriver/remote/webdriver.py", line 236, in
    execute self.error_handler.check_response(response) File
    "/Library/Python/2.7/site-packages/selenium-2.53.5- 
    py2.7.egg/selenium/webdriver/remote/errorhandler.py", line 194, in<br>
    check_response
        raise exception_class(message, screen, stacktrace) selenium.common.exceptions.StaleElementReferenceException: Message:
    stale    element reference: element is not attached to the page
    document   (Session info: chrome=51.0.2704.106)   (Driver info:
    chromedriver=2.22.397929<br>
    (fb72fb249a903a0b1041ea71eb4c8b3fa0d9be5a),platform=Mac OS X 10.11.5
    x86_64)</p>
  </blockquote>