How can I identify buttons, created in a loop?

Question

I am trying to program a minesweeper game on python using tkinter. I started off by creating a grid of buttons using a two dimensional list of 10x10. Then I created each but

Answer 1

If you just want to destroy the Button widget, the simple way is to add the callback after you create the button. Eg,

import Tkinter as tk

grid_size = 10

root = tk.Tk()
blank = " " * 3
for y in range(grid_size):
    for x in range(grid_size):
        b = tk.Button(root, text=blank)
        b.config(command=b.destroy)
        b.grid(column=x, row=y)

root.mainloop()

However, if you need to do extra processing in your callback, like updating your grid of buttons, it's convenient to store the Button's grid indices as an attribute of the Button object.

from __future__ import print_function
import Tkinter as tk

class ButtonDemo(object):
    def __init__(self, grid_size):
        self.grid_size = grid_size
        self.root = tk.Tk()
        self.grid = self.button_grid()
        self.root.mainloop()

    def button_grid(self):
        grid = []
        blank = " " * 3
        for y in range(self.grid_size):
            row = []
            for x in range(self.grid_size):
                b = tk.Button(self.root, text=blank)
                b.config(command=lambda widget=b: self.delete_button(widget))
                b.grid(column=x, row=y)
                #Store row and column indices as a Button attribute
                b.position = (y, x)
                row.append(b)
            grid.append(row)
        return grid

    def delete_button(self, widget):
        y, x = widget.position
        print("Destroying", (y, x))
        widget.destroy()
        #Mark this button as invalid 
        self.grid[y][x] = None

ButtonDemo(grid_size=10)

Both of these scripts are compatible with Python 3, just change the import line to

import tkinter as tk