# Tk_center_window.py

# Tk_center_window.py

import Tkinter
root=Tkinter.Tk()
x = (root.winfo_screenwidth() - root.winfo_reqwidth()) / 2
y = (root.winfo_screenheight() - root.winfo_reqheight()) / 2
root.geometry("124x24+%d+%d" % (x, y))
label=Tkinter.Label(root,text='Hello ,World!')
label.pack()
root.mainloop()