How can i do full screen?
How can i get size of monitor?
Is that possible?

Try this short Tkinter code, only tested it on Windows XP:

from Tkinter import *

root = Tk()

sw = root.winfo_screenwidth()
sh = root.winfo_screenheight()

# test
print "screen width  =", sw
print "screen height =", sh 

# set to full screen use this:
root.geometry("%dx%d+0+0" % (sw, sh))

# more code here

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