Tkinter problem: TclError> couldn't connect to display ":0

[Dave Farrance]

gemjack.pb at gmail.com wrote:

>This fixed my problem with thkinter.....   sudo cp ~/.Xauthority ~root/

Which means that you were creating a GUI window with Python as root,
which is to be avoided if you can. If you can't avoid it and you're
running it with sudo in a bash console, rather than a root console, then
I'd suggest adding the line...

XAUTHORITY=$HOME/.Xauthority

...to the root's .bashrc which avoids putting a specific user's
xauthority file in the root directory.