Detecting lock screen on Mac through Python3

Question

Trying to find a way to detect if the screen is locked on a Mac system, using Python3

I've tried the following, and it gives a KeyError:

import Quartz
gui_dict = Quartz.CGSessionCopyCurrentDictionary()
print(gui_dict['CGSSessionScreenIsLocked'])

edit:

import Quartz
all_windows = Quartz.CGWindowListCopyWindowInfo(Quartz.kCGWindowListOptionOnScreenOnly, Quartz.kCGNullWindowID)
for x in all_windows:
    if x["kCGWindowOwnerName"] == "loginwindow"
        print("Locked!")

This code works on Python2, but not 3 considering /usr/bin/python needs to be used to import Quartz.

Answer 1

Install quartz -
pip install pyobjc-framework-Quartz

Much simple code -

import Quartz
d = Quartz.CGSessionCopyCurrentDictionary()
print('CGSSessionScreenIsLocked' in d.keys())