title: vncdotool cannot connect to remote vnc server python
body: <p>Im stuck in this error and i dont know why im getting this error. I successfully installed all the pre-requirements in using the vncdotool and i read that they support python 3 now. Im using RealVNC but i guess that does not matter.
  Here's the error below.</p>
  
  <pre><code>client = api.connect('vnchost:192.168.1.19:5800',password='pw@0987676')
  </code></pre>
  
  <pre><code>client.captureScreen('screenshot.png')
  client.keyPress('enter')
  
  File "C:\Python3.7.4\lib\site-packages\vncdotool\api.py", line 108, in proxy_call
      raise VNCDoException(result)
  vncdotool.api.VNCDoException: [Failure instance: Traceback (failure with no frames): &lt;class 'twisted.internet.error.DNSLookupError'&gt;: DNS lookup failed: vnchost.
  ]
  </code></pre>