Python Xlib code to write to root window

python-xlib-root-text.py

#!/usr/bin/env python3

import secrets
import Xlib
import Xlib.display
import Xlib.X

display = Xlib.display.Display()
screen = display.screen()
root = screen.root

root.change_attributes(event_mask=Xlib.X.ExposureMask)

gc = root.create_gc(foreground = screen.white_pixel, background = screen.black_pixel)

def draw_it():
    text = secrets.token_hex(20).encode("utf-8")
    root.draw_text(gc, 30, 30, text)
    display.flush()

draw_it()
while 1:
    if display.pending_events() != 0:  # check to safely apply next_event
        event = display.next_event()
        if event.type == Xlib.X.Expose and event.count == 0:
            draw_it()