python simple TK example

whatnow.py

#!/usr/bin/env python
from Tkinter import *
import sys

answer = ""

def center(toplevel):
    toplevel.update_idletasks()
    w = toplevel.winfo_screenwidth()
    h = toplevel.winfo_screenheight()
    size = tuple(int(_) for _ in toplevel.geometry().split('+')[0].split('x'))
    #x = w/2 - size[0]/2
    #y = h/2 - size[1]/2
    x = 1900
    y = 0
    toplevel.geometry("%dx%d+%d+%d" % (size + (x, y)))

class MyDialog:
    def __init__(self, parent):

        top = self.top = parent

        Label(top, text="Value").pack()

        self.e = Entry(top)
        self.e.pack(padx=5)

        b = Button(top, text="OK", command=self.ok)
        b.pack(pady=5)
	self.e.focus()

    def ok(self):
	global answer
	answer = self.e.get()
	
        self.top.destroy()

if len(sys.argv) >= 2:
	answer = sys.argv[1]

root = Tk()
d = MyDialog(root)

root.wait_window(d.top)

root2 = Tk()

w = Label(root2, text=answer)
w.config(font=("Courier", 44))
w.pack()

center(root2)
print("HERE")

root2.mainloop()