tkinter3.py

   1 import tkinter as tk
   2
   3 def increase():
   4     value=int(lbl_value["text"])
   5     lbl_value["text"]=f"{value+1}"
   6
   7 def decrease():
   8     value=int(lbl_value["text"])
   9     lbl_value["text"]=f"{value-1}"
  10
  11 window=tk.Tk()
  12 window.title("TEST")
  13 window.rowconfigure(0, minsize=50, weight=1)
  14 window.columnconfigure([0,1,2], minsize=50, weight=1)
  15
  16 btn_decrease=tk.Button(master=window, text="-", command=decrease)
  17 btn_decrease.grid(row=0, column=0, sticky="nsew")
  18
  19 lbl_value=tk.Label(master=window, text="0")
  20 lbl_value.grid(row=0, column=1)
  21
  22 btn_increase=tk.Button(master=window, text="+", command=increase)
  23 btn_increase.grid(row=0, column=2, sticky="nsew")
  24
  25 window.mainloop()