title: Error in python-selenium bindings for chromedriver
body: <p>I am trying to create an instance of chrome driver after installing chrome driver successfully by seeing the post <a href="http://install-climber.blogspot.in/2012/06/setupseleniumchromedriverubuntulinux.html" rel="nofollow noreferrer">here</a>. 
  As shown in the post i downloaded <code>chrome-driver 64-bit</code> for python. And i moved the chromedriver executable file to <code>/usr/bin</code>, and tried the following code</p>
  
  <pre><code> from selenium import webdriver
   driver = webdriver.Chromedriver()
  </code></pre>
  
  <p><strong>Result</strong>     :</p>
  
  <pre><code>---------------------------------------------------------------------------
  AttributeError                            Traceback (most recent call last)
  
  /home/local/user/&lt;ipython console&gt; in &lt;module&gt;()
  
  AttributeError: 'module' object has no attribute 'Chromedriver'
  </code></pre>
  
  <p>Also when tried the following </p>
  
  <pre><code> from selenium import webdriver
   driver = webdriver.Firefox()
  </code></pre>
  
  <p><strong>Result:</strong></p>
  
  <pre><code>WebDriverException                        Traceback (most recent call last)
  
  /home/local/&lt;ipython console&gt; in &lt;module&gt;()
  
  /usr/lib/python2.7/site-packages/selenium-2.21.3-py2.7.egg/selenium/webdriver/firefox/webdriver.pyc in __init__(self, firefox_profile, firefox_binary, timeout)
       49         RemoteWebDriver.__init__(self,
       50             command_executor=ExtensionConnection("127.0.0.1", self.profile,
  ---&gt; 51             self.binary, timeout),
       52             desired_capabilities=DesiredCapabilities.FIREFOX)
       53 
  
  /usr/lib/python2.7/site-packages/selenium-2.21.3-py2.7.egg/selenium/webdriver/firefox/extension_connection.pyc in __init__(self, host, firefox_profile, firefox_binary, timeout)
       45         self.profile.add_extension()
       46 
  ---&gt; 47         self.binary.launch_browser(self.profile)
       48         _URL = "http://%s:%d/hub" % (HOST, PORT)
       49         RemoteConnection.__init__(
  
  /usr/lib/python2.7/site-packages/selenium-2.21.3-py2.7.egg/selenium/webdriver/firefox/firefox_binary.pyc in launch_browser(self, profile)
       42 
       43         self._start_from_profile_path(self.profile.path)
  ---&gt; 44         self._wait_until_connectable()
       45 
       46     def kill(self):
  
  /usr/lib/python2.7/site-packages/selenium-2.21.3-py2.7.egg/selenium/webdriver/firefox/firefox_binary.pyc in _wait_until_connectable(self)
       79                 raise WebDriverException("The browser appears to have exited "
       80                       "before we could connect. The output was: %s" %
  ---&gt; 81                       self._get_firefox_output())
       82             if count == 30:
       83                 self.kill()
  
  WebDriverException: Message: 'The browser appears to have exited before we could connect. The output was: *** LOG addons.xpi: startup\n*** LOG addons.xpi: checkForChanges\n*** LOG addons.xpi: Opening database\n*** LOG addons.xpi: No changes found\nFailed to dlopen /usr/lib/libX11.so.6\ndlerror says: /usr/lib/libX11.so.6: wrong ELF class: ELFCLASS32\n' 
  </code></pre>
  
  <p>I am unable know whats happening here, and why both chrome and firefox web drivers are not working.</p>