tkinter in normal program?

Question

how do you use open and close a tkinter window around normal code?
I.e
#code here
#open window (normal code stops until window closes)
#code here
EDIT: I have used withdraw() to hide it

Answer 1

from tkinter import Tk, Label
simple = Tk()
Label(simple, text='hello')
# code here
simple.mainloop()
# code here