import tkinter
from tkinter import *

window = tkinter.Tk()

count = 0

def buttonClickedCountUp():
    global count
    count = count + 1
    v.set(count)
    #label.set(count)
def buttonClickedCountDown():
    global count
    count = count - 1
    v.set(count)
def buttonClickedReset():
    global count
    count = 0
    v.set(count)
    #messagebox.showinfo("title","body")


button = tkinter.Button(window, text="Up", command = buttonClickedCountUp)
button.pack()
button2 = tkinter.Button(window, text="Down", command = buttonClickedCountDown)
button2.pack()
button3 = tkinter.Button(window, text="Reset", command = buttonClickedReset).pack()
v = StringVar()
label = tkinter.Label(window,textvariable=v).pack()
v.set(count)



window.mainloop()