Remove GTK window decorations for a named window

gtk_remove_decorations.py

#!/usr/bin/env python

import sys

try:
    from gtk import gdk
except ImportError:
    raise SystemExit("You need to have python-gtk installed for this to work")


def remove_decorations(name):
    root = gdk.get_default_root_window()
    
    names = []
    
    for id in root.property_get('_NET_CLIENT_LIST')[2]:
        
        w = gdk.window_foreign_new(id)
        names.append(w.property_get('WM_NAME')[2])
        
        if w and names[-1].startswith(name):
            if w.get_decorations() != 0 :
                w.set_decorations(0)
            else:
                w.set_decorations(gdk.DECOR_ALL)
            gdk.window_process_all_updates()
            names = None
            break
    
    if names:
        raise SystemExit("No window named '%s' found, names seen:\n    %s" % (name, '\n    '.join(names)))


if __name__ == '__main__':
    if len(sys.argv) != 2:
        raise SystemExit("Pass only the window name as a single argument")
    remove_decorations(sys.argv[1])

first time must be executed twice, is this intended?

I did not even remembered this existed, is it still working?

yeah, I did a search about set_decorations and your result is the most polished.
:)