Thoughts or ideas?

--snip--

global randomappui

try:
  from gi.repository import Gtk

  class RandomAppUI(Gtk.Window):
    def __init__(self):
      super().__init__()
  randomappui = RandomAppUI
except:
  class SadFace():
    def __init__(self):
      print("Graphical User Interface disabled... I couldn't import Gtk\n:'(")
      sys.exit(1)
  randomappui = SadFace

if __name__ == '__main__':
  parser = argparse.ArgumentParser()
  parser.add_argument("--input", help="Some input file")
  args = parser.parse_args()
  if args.input:
    abs_url = ''
    print("File provided: " + args.input)
    if args.input[0] == '/':
      abs_url = args.input
    else:
      stem = os.getcwd()
      abs_url = stem + '/' + args.input
    do_something(abs_url)
  else:
    win = randomappui()
    Gtk.main()
--/snip--