File: //opt/cloudlinux/venv/lib/python3.11/site-packages/pyvirtualdisplay/examples/screenshot.py
"Create screenshot of xmessage in background using 'smartdisplay' submodule"
from easyprocess import EasyProcess
from pyvirtualdisplay.smartdisplay import SmartDisplay
# 'SmartDisplay' instead of 'Display'
# It has 'waitgrab()' method.
# It has more dependencies than Display.
with SmartDisplay() as disp:
with EasyProcess(["xmessage", "hello"]):
# wait until something is displayed on the virtual display (polling method)
# and then take a fullscreen screenshot
# and then crop it. Background is black.
img = disp.waitgrab()
img.save("xmessage.png")