How to make a window with buttons in python

Question

How do I create a function that makes a window with two buttons, where each button has a specified string and, if clicked on, returns a specified variable? Similar to @ 3:05 in

Answer 1

#Creating a GUI for entering name
def xyz():
    global a
    print a.get() 
from Tkinter import *
root=Tk()  #It is just a holder
Label(root,text="ENter your name").grid(row=0,column=0) #Creating label
a=Entry(root)           #creating entry box
a.grid(row=7,column=8)
Button(root,text="OK",command=xyz).grid(row=1,column=1)
root.mainloop()           #important for closing th root=Tk()

This is the basic one.