python3-xlib

import Xlib.display import Xlib.error import os try: # Attempt to connect to the X server using the DISPLAY environment variable # or a default if not set (e.g., for testing without a real X server). # For actual usage, ensure DISPLAY is correctly set (e.g., ':0' or 'localhost:0'). display_name = os.environ.get('DISPLAY', ':0') # Use ':0' as a common default display = Xlib.display.Display(display_name) print(f"Successfully connected to X display: {display_name}") # Get the root window of the default screen root_window = display.screen().root print(f"Root window ID: {root_window.id}") # Query the input focus window input_focus = display.get_input_focus() if input_focus.focus: print(f"Current input focus window ID: {input_focus.focus.id}") else: print("No specific window currently has input focus.") except Xlib.error.DisplayError as e: print(f"Error connecting to X display '{display_name}': {e}") print("HINT: Ensure an X server is running and the DISPLAY environment variable is correctly set.") except Exception as e: print(f"An unexpected error occurred: {e}") finally: if 'display' in locals() and display: display.close() print("Disconnected from X display.")