Script Python para alterar o wallpaper

change_wallpaper.py

#!/usr/bin/env python3

import glob
import os
import random
import time
import subprocess
from pathlib import Path

PICTURES_PATH = os.path.join(os.path.expanduser("~"), "Pictures")
WALLPAPERS_PATH = os.path.join(PICTURES_PATH, "Wallpapers")

def _gsettings_get(schema: str, key: str) -> str | None:
  try:
    out = subprocess.check_output(
      ["gsettings", "get", schema, key],
      stderr=subprocess.STDOUT,
      text=True
    ).strip()

    return out.strip().strip("'")
  except Exception:
    return None

def is_dark_mode() -> bool:
  cs = _gsettings_get("org.gnome.desktop.interface", "color-scheme")
  
  if cs:
    return "prefer-dark" in cs
  
  theme = _gsettings_get("org.gnome.desktop.interface", "gtk-theme")

  return bool(theme and "dark" in theme.lower())

def choose_wallpaper() -> str | None:
  wallpapers = [p for p in glob.glob(WALLPAPERS_PATH + "/**/*", recursive=True) if os.path.isfile(p)]

  if not wallpapers:
    return None

  return random.choice(wallpapers)

while True:
  dark = is_dark_mode()
  key = "picture-uri-dark" if dark else "picture-uri"
  wallpaper = choose_wallpaper()
  
  if wallpaper:
    uri = Path(wallpaper).as_uri()
    cmd = f'gsettings set org.gnome.desktop.background {key} "{uri}"'
    os.system(cmd)

  time.sleep(5 * 60)  # 5 minutos