from tkinter import *
ventana = Tk()
ventana.title("Boton")
label1 = Label(ventana, text="Soy un label")
label1.grid(row=1, column=2)
boton = Button(ventana, text="Boton",bg="red", command=Message("Hola mundo", "Hola mundo"))
boton.grid(row=1,column=1)
ventana.mainloop()