El sudo grafico universal para escritorios GTK/QT/loquesea, inspirado en el funcionamiento de xdg-open.

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Licence: GPLv3
# xdg-sudo: Automatically choose "gksudo" or "kdesudo"
import os
import sys
#import antigravity
import subprocess
import re
if os.geteuid()==0: # non-root check, because if you are root, all this is pointless
    sys.exit(" ERROR: Do not run as root...\n")
else:
    print (" You are normal user... \n")
# Prepare actual command to execute
parameters = " ".join([re.escape(a) for a in sys.argv[1:]])
# Test which tools exist
kdesudo = os.path.exists('/usr/bin/kdesudo')
gtksudo = os.path.exists('/usr/bin/gksudo')
# If we have at least one of them, check which one to use.
if kdesudo or gtksudo:
    if kdesudo and gtksudo:
        # Test if gnome runs
        process = subprocess.Popen("ps -ae | grep gnome-session", shell=True, stdout=subprocess.PIPE)
        process.wait()
        if len(process.communicate()[0])>0:
            useGnome = True
        else:
            useGnome = False
    elif kdesudo and (not gtksudo):
        useGnome = False
    elif (not kdesudo) and gtksudo:
        useGnome = True
    # really run it
    if useGnome:
        cmd = "gksudo "
    else:
        cmd = "kdesudo "
    # Run the actual program now
    os.system(cmd+parameters)
else:
    # we dont have gksudo or kdesudo, OMFG!
    cmd = "xterm -e \"echo 'Neither \\\"gksudo\\\" nor \\\"kdesudo\\\" have been found on your machine. Thus, \\\"sudo\\\" is being used. Please leave this window open until the program has finished. Your are asked for your password below.'; sudo "+parameters+"; sleep 1\""
    os.system(cmd)

Disclaimer: el uso o no de SheBang/Declaracion de Encoding queda a criterio del usuario.