minesweeper of doom | Python Fiddle

import random

height = 10
width = 10
mines = 10

def get_empty_board(height, width): 
    return [[None for x in range(width)] for y in range(height)]

def get_board_dims(board):
    return len(board), len(board[0])

def lay_mines(board, mines):
    height, width = get_board_dims(board)
    mines_layed = 0
    while mines_layed < mines:
        x = random.randint(0, width - 1)
        y = random.randint(0, height - 1)

if board[y][x] is None:
	        board[y][x] = True
	        mines_layed += 1
    
    return board

def get_neighbours(board, cx, cy):
    height, width = get_board_dims(board)
    cells = []
    for dx in range(-1, 2):
        x = cx + dx
        for dy in range(-1, 2):
            y = cy + dy
            if not (dx == 0 and dy == 0) and (y >= 0 and y < height) and (x >= 0 and x < width):
                cells.append(board[y][x])
    
    return cells

def rate_board(board):
    height, width = get_board_dims(board)
    for y in range(height):
        for x in range(width):
            if board[y][x] is not True:
                neighbours = get_neighbours(board, x, y)
                board[y][x] = len(filter(lambda x: x is True, neighbours))
                
    return board

def display_board(board):
    print '0123456789'
    print '=' * 9
    for row in board:
        print ''.join('X' if cell is True else unicode(cell) for cell in row)

display_board(rate_board(lay_mines(get_empty_board(height, width), mines)))

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