# Tk_button_grid_layout_borderwidth_of_3.py

# Tk_button_grid_layout_borderwidth_of_3.py

from Tkinter import *

root = Tk()

Button(root, text='R1-C1', borderwidth=3).grid(row=1, column=1)
Button(root, text='R1-C2', borderwidth=3).grid(row=1, column=2)
Button(root, text='R2-C3', borderwidth=3).grid(row=2, column=3)
Button(root, text='R2-C4', borderwidth=3).grid(row=2, column=4)
Button(root, text='R3-C3', borderwidth=3).grid(row=3, column=3)
Button(root, text='R4-C1', borderwidth=3).grid(row=4, column=1)

root.mainloop()