the apple desapairs

[gabopython]

sometimes there is no apple to eat, i think it takes the same position then the rock

It seems like both snake.py and snake2.py don't keep track of position of Snake, Apple and Stone.
To fix this, you could create a global array and insert the position of each created object (Apple, Snake and Stone). Then you could try to generate a new position until you get one that is not in the array yet.

It could look like this:

# Global array to keep track of positions of all spawned objects
init_positions = []

# Function to generate a unique position
def get_random_position():

    # Lambda function to generate random position within the game screen
    random_position = lambda: (random.randint(0, GRID_WIDTH-1) * GRIDSIZE, random.randint(0, GRID_HEIGHT-1) * GRIDSIZE)

    # Generate initial random position
    position = random_position()

    # Keep generating a new position until it's one that is not in the array yet
    while(position in init_positions):
        position = random_position()

    # Store the new position
    init_positions.append(position)

    # Return the newly generated position
    return position

And then replace the position assignments in both the Rock and Snake class from

        self.position = (random.randint(0, GRID_WIDTH-1) * GRIDSIZE, random.randint(0, GRID_HEIGHT-1) * GRIDSIZE)    

to

        self.position = get_random_position()