title: To send threekeys using send_keys() in selenium python webdriver
body: <p>I am trying to type a float number  into a textbox with default value 0.00.But it tries to get appended instead of overwriting it.I tried with .clear() and then send_keys('123.00') but still it gets appended. 
  Then i tried with send_keys(Keys.CONTROL+'a','123.00').It updates 0.00 only.</p>
  
  <p>Any help is really appreciated.</p>
  
  <p>For more info ..
  URL : <a href="http://new.ossmoketest.appspot.com" rel="noreferrer">http://new.ossmoketest.appspot.com</a>
  userid: senthil.arumugam@mycompanyname.com  -- mycompanyname = orangescape  (sorry to avoid spam mails)
  password not needed now.
  click purchaseorder... in the form please new product and new price... sample application for automation.. thanks</p>