tkinter issue

[mate]

OH! loking at your code I can now see what I was doing wrong. I misunderstood the lambda command but I think I understand now.
Thank you very much!

I don't know how much benefit there is in making buttons in a loop when they are bound to different functions. Unless the functions are all the same function with different arguments.

from tkinter import *

def grid_fill(frame):
    colors = ['red', 'green']
    k = 0
    for j in range(5):
        for i in range(5):
            k += 1
            color = colors[i % len(colors)]
            b = Button(frame, text = str(k), width = 3, height = 2, bg=color)
            b.configure(command=lambda x=k: print(x))
            b.grid(row=j, column=i)

grid_fill(Tk())
mainloop()

I'm doing three things here
1. Calculating the button label.
2. Looking up the button color.
3. Setting a callback with button specific arguments.