A little script to toggle all window titlebar on ubuntu

decorator-modifier.py

#!/usr/bin/python
import argparse
from gi import require_version

require_version('Gdk', '3.0')
from gi.repository import Gdk

def check_args():
    parser = argparse.ArgumentParser(description="Script to toggle the titlebar into Unity windows.")
    parser.add_argument('-D', '--decorate', help='Decorate window.',
                        action='store_true', dest='decorate')
    parser.add_argument('-F', '--focus', help='apply the decoration modification only on focused window.', action='store_true')
    return parser.parse_args()

if __name__ == "__main__":
    screen = Gdk.Screen.get_default()
    args = check_args()
    decorator = False

    if args.decorate:
        decorator = Gdk.WMDecoration.ALL
    if args.focus:
        windows = [screen.get_active_window()]
    else:
        windows = screen.get_window_stack()

    for win in windows:
        win.set_decorations(decorator)
    Gdk.Window.process_all_updates()