Simple clock using PyGTK and GObject.timeout_add()

clock.py

#!/usr/bin/python
from gi.repository import Gtk, GObject
from datetime import datetime

class MainWindow(Gtk.Window):
	def __init__(self):
		Gtk.Window.__init__(self, title="app")

		self.box = Gtk.Box(spacing=6)
		self.add(self.box)

		self.label = Gtk.Label()
		self.box.pack_start(self.label, True, True, 0)

	# Displays Timer
	def displayclock(self):
		#  putting our datetime into a var and setting our label to the result. 
		#  we need to return "True" to ensure the timer continues to run, otherwise it will only run once.
		datetimenow = str(datetime.now())
		self.label.set_label(datetimenow)
		return True

	# Initialize Timer
	def startclocktimer(self):
		#  this takes 2 args: (how often to update in millisec, the method to run)
		GObject.timeout_add(1000, self.displayclock)


win = MainWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
win.startclocktimer()
Gtk.main()

I was helping a student out with some basic timer/threading concepts and found there was nothing simple that was searchable via google. Hopefully this helps someone out. Please TRY and understand what is going on (especially here: http://www.pygtk.org/pygtk2reference/gobject-functions.html#function-gobject--timeout-add) and not just copy and paste. You'll thank me later! :)

edit: There is one problem with this. Upon opening the program for the first time, it takes an initial 1000ms to initially display the time... how could you solve it in the least amount of steps? Enjoy!

thank you

Thank you

Answering your edit:
Simply call displayclock() on the init function and then call startclocktimer()
If you call that function before Gtk.main() it will always delay your startup, so, get rid of that

Thank you for this

Many thanks, this got me out of an issue that had been haunting me for a long while.