Basic Python GUI

#gui.py

import time
import tkinter

class GUI(object):

    #GUI.create()
    #loads interface
    def create (self, parent):

        #remember the root
        self.window = parent

        #simplify tkinter variables
        left = tkinter.LEFT
        right = tkinter.RIGHT

        self.container = tkinter.Frame(parent)
        self.button1 = tkinter.Button(self.container)
        #self.button2 = tkinter.Button(self.container)

        self.button1["text"]= "Hello, World!"
        self.button1["background"]= "white"
        self.button1.bind("<Button-1>", self.button1Click)
        self.button1.bind("<ButtonRelease-1>", self.button1Release)
        #self.button2["text"]= "Hello, World2!"
        #self.button2["background"]= "white"

        self.container.pack()
        self.button1.pack(side = left)
        #self.button2.pack(side = left)

        print("Window created")

    def run (self, parent):

        #mainloop

        parent.mainloop()

        #on window close

        print("WIndows closed!")
        time.sleep(1)

    def button1Click(self, event):

        self.button1["text"] = "Click!"

    def button1Release(self, event):

        self.button1["text"] = "Hello, World!"