finding monitor or screen resolution in Linux with standard python module

[akbar]

I googled and searched in archive. All I can find is finding
resolution with Tkinter and pygame. Any idea to find monitor
resolution with standard python module?
I can check from output of: xprop -root
_NET_DESKTOP_GEOMETRY(CARDINAL) . The problem is when you use Beryl or
Xgl, it is not correct anymore because Beryl or Xgl set this value
from amount of workspaces multiplied by monitor or screen resolution.