Campo Minado

import random

class square(object):
    def __init__(self):
        self.is_bomb = random.choice([True, False])
        self.n_bomb = 0
    def __str__(self):
        if self.is_bomb:
            return 'x'
        else:
            return str(self.n_bomb)

def look_neighborhood(board):
    n = 10
    m = 10
    for x in range(n):
        for y in range(m):
            bombs = 0
            for i in range(x-1,x+2):
                for j in range(y-1, y+2):
                    if i >= 0 and i < n and j >= 0 and j < m:
                        if board[i][j].is_bomb: bombs += 1
                        board[x][y].n_bomb = bombs

def print_board(board):
    for x in board:
        for y in x:
            print(y, end=' ')
        print()

def init_board():
    board = [[square() for m in range(10)] for n in range(10)]
    return board

board = init_board()
look_neighborhood(board)
print_board(board)