sp7

def shuffle_boxs(boxs,num_moves):
    global BLANK,ALLMOVES
    moves_gen = []
    ALLMOVES  = [UP,DOWN,LEFT,RIGHT]
    HMOVES = [LEFT,RIGHT]
    VMOVES = [UP,DOWN]
    last_move = None
    for i in range(num_moves):
        if i % 2 ==0:
            move = VMOVES[random.randint(0,1)]
            while is_valid_move(move) != True:
                move = VMOVES[random.randint(0,1)]
        else:
             move = HMOVES[random.randint(0,1)]
             while is_valid_move(move) != True:
                move = HMOVES[random.randint(0,1)]
        if  move == LEFT :             
            (boxx,boxy) = (BLANK[0]+1,BLANK[1])
        elif move == RIGHT  :
            (boxx,boxy) = (BLANK[0]-1,BLANK[1])
        elif move == UP :
            (boxx,boxy) = (BLANK[0],BLANK[1]+1)
        elif move == DOWN  :
            (boxx,boxy) = (BLANK[0],BLANK[1]-1)      
        boxs[BLANK[0]][BLANK[1]].num = boxs[boxx][boxy].num
        boxs[BLANK[0]][BLANK[1]].is_blank = False
        boxs[boxx][boxy].move_to(move)
        ALLMOVES.append(move)
        last_move = move