[Python] How would I render an image using python-xlib?

I am trying to make a window manager in python 3 and I need to find out how to render 16x16 window icons.

I have used Pillow and Xlib to render a dummy image, and I was expecting that it would work, but nope! It didn't.

The test program is mostly just initializing the window and generating the image, the faulty part is (at least one problem, there probably are more): screen.default_visual. I can't find any documentation on ANY of this, any help would be appreciated.

from Xlib import display, X, Xutil
from PIL import Image, ImageDraw
import os

def renderPng(image_path, width, height, x=50, y=50):
img = Image.open(image_path)
if img.mode != 'RGB':
img = img.convert('RGB')
image_data = img.tobytes("raw", "RGB")
disp = display.Display()
screen = disp.screen()
root = screen.root
visual = screen.default_visual
depth = screen.root_depth
win = root.create_window(
x, y,
width, height,
1,
depth,
X.InputOutput,
visual,
background_pixel=screen.white_pixel,
event_mask=X.ExposureMask | X.KeyPressMask | X.StructureNotifyMask
)
win.set_wm_name("PNG image")
win.map()
gc = win.create_gc(
foreground=screen.black_pixel,
background=screen.white_pixel
)
ximage = Xlib.X.Image(
data=image_data,
width=16,
height=16,
depth=depth,
bitmap_unit=8,
bitmap_pad=32,
byte_order=X.LSBFirst,
bitmap_bit_order=X.LSBFirst,
format=X.ZPixmap,
bytes_per_line=16 * 3
)
while True:
event = disp.next_event()
if event.type == X.Expose:
if event.count == 0:
win.put_image(gc, ximage, 0, 0, 0, 0, 16, 16)
disp.flush()
elif event.type == X.KeyPress:
break
elif event.type == X.ConfigureNotify:
pass
win.destroy()
disp.close()

if __name__ == '__main__':
dummy = "dummy.png"
if not os.path.exists(dummy):
img = Image.new('RGB', (16, 16), color = 'red')
d = ImageDraw.Draw(img)
d.text((1,1), "abc", fill=(255,255,255))
img.save(dummy)
renderPng(dummy, 200, 200, 100, 100)


And the code gives me this error:

Traceback (most recent call last):
File "/home/spincube/.local/lib/python3.13/site-packages/Xlib/protocol/rq.py", line 1293, in __getattr__
return self._data[attr]
~~~~~~~~~~^^^^^^
KeyError: 'default_visual'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/spincube/x/test.py", line 63, in <module>
renderPng(dummy, 200, 200, 100, 100)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/spincube/x/test.py", line 13, in renderPng
visual = screen.default_visual
^^^^^^^^^^^^^^^^^^^^^
File "/home/spincube/.local/lib/python3.13/site-packages/Xlib/protocol/rq.py", line 1297, in __getattr__
raise AttributeError(attr)
AttributeError: default_visual

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