# Tk_3x4_btns.py

# Tk_3x4_btns.py

import tkinter as tk

root = tk.Tk()

testList = ['A','B','C']

nrows = 4
ncols = 3
for r in range(nrows):
    for c in range(ncols):
        btn = tk.Button(text=f'{testList[c]} : {c} : {r}' ,padx=50, pady=50)
        btn.grid(row = r, column=c)

root.mainloop()