How to fix error Xlib.error.DisplayConnectionError: Can't connect to display “:0”: b'No protocol specified\n'

Question

I\'m making some program with python3 and XLib.

On my PC with Ubuntu 14.04 everything works fine but when I try to run my app in my notebook with manualy installed Xorg

Answer 1

Temporary workaround is

$ xhost +

http://ubuntuforums.org/showthread.php?t=2290602