title: python selenium send_keys CONTROL, 'c' not copying actual text
body: <p>I successfully highlight the section in a web page, but send_keys, <code>.send_keys(Keys.CONTROL, "c")</code>, does not place the intended text to copy in clipboard, only the last thing I manually copied is in clipboard:</p>
  
  <pre><code>from selenium import webdriver 
  
  from selenium.webdriver.common.keys import Keys 
  
  driver = webdriver.Firefox() 
  
  driver.get("http://www.somesite.com") 
  
  driver.find_element_by_id("some id").send_keys(Keys.CONTROL, "a") #this successfully highlights section I need to copy 
  
  elem.send_keys(Keys.CONTROL, "c") # this does not actually copy text**
  </code></pre>
  
  <p>I tried then using the Firefox edit menu to select all and copy text, but didn't work either and cant find anything online to assist other than possible mention of a bug (tried old version of Firefox, but didn't solve issue). Any ideas?</p>