tiles.py

import pygame
pygame.init()

clock = pygame.time.Clock()
size = 100, 100
screen = pygame.display.set_mode(size)

wall = pygame.image.load("wall.png")
floor = pygame.image.load("floor.png")

map = [
    [1,1,1,1,1],
    [1,0,0,0,1],
    [1,0,1,0,1], 
    [1,0,0,0,1],
    [1,1,1,1,1]] 

row = 0; column = 0
for maprow in map:
    column = 0
    for tile in maprow:
        print "%s at coords (%s,%s)" % (tile,column,row)
        if tile == 1:
            screen.blit(wall,[column * 20, row * 20])
        elif tile == 0:
            screen.blit(floor,[column * 20, row * 20])
        column += 1
    row += 1
pygame.display.flip()