title: am getting a error in pyvirtualdisplay
body: <p>when i run the  python script it shows error like this,i want to know the procedure or any way to solve these error.can anyone help me?</p>
  
  <pre><code>Traceback (most recent call last):
    File "bus1.py", line 19, in &lt;module&gt;
      display = Display(visible=0, size=(800, 600),use_xauth=True)
    File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/display.py", line 38, in __init__
      **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/xvfb.py", line 33, in __init__
      AbstractDisplay.__init__(self)
    File "/usr/local/lib/python2.7/dist-packages/pyvirtualdisplay/abstractdisplay.py", line 40, in __init__
      raise xauth.NotFoundError()
  pyvirtualdisplay.xauth.NotFoundError
  </code></pre>