snake game

Question

Hi Everyone,
I'm almost finished with my snake game but have a bug when the snake and the apple collide the second time. The first time works; the apple is set to a new location, but the second time it doesn't move. I see in my terminal the values are changing when they do collide, but again, the apple does not move. Also I had to take some lines out. Not all of it would fit
Appreciate any help
Thank you!

#create the screen
screen = pygame.display.set_mode((800, 600))

# Tile and Icon
pygame.display.set_caption("Snake Game")

# snake Head
snakeImg = pygame.image.load('snakeHead.png')
snakeImgX = 400
snakeImgY = 300
snakeImgX_change = 0
snakeImgY_change = 0

# snake body
snakeBody = pygame.image.load('snakeBody.png')

#Apple
appleImg = pygame.image.load('apple.png')
appleX = random.randint(0, 800)
appleY = random.randint(50, 150)

def apple(x, y):
screen.blit(appleImg, (appleX, appleY))

def snake(x, y):
screen.blit(snakeImg, (snakeImgX, snakeImgY))

def isCollison(snakeImgX, snakeImgY, appleX, appleY):
distance = math.sqrt((math.pow(snakeImgX - appleX, 2)) + (math.pow(snakeImgY - appleY, 2)))
if distance < 27:
return True
else:
return False

# Game loop
running = True
while running:
screen.fill((0, 150, 0))

for event in pygame.event.get():
# if keystroke is pressed, check if its up, down, left, or right

if event.type == pygame.QUIT:
running = False

# Moving Snake
snakeImgX += snakeImgX_change
snakeImgY += snakeImgY_change

if snakeImgX <=0:
snakeImgX = 770
elif snakeImgX >= 770:
snakeImgX = 0

if snakeImgY <=0:
snakeImgY = 570
elif snakeImgY >= 570:
snakeImgY = 0

# Collision
collision = isCollison(snakeImgX, snakeImgY, appleX, appleY)
if collision:
appleY = 480

snake(snakeImgX, snakeImgY)
apple(appleX, appleY)
pygame.display.update()

Answer 1

David so I checked the code, you don't update the position. In the if collision statement (line 112), you change appleY to 480, but you never change it again. Also, you don't change appleX.

Instead, add these lines (and remove line 113):
appleY = random.randint(start, end)
appleX = random.randint(start, end)

Now it should work fine, let me know if you have more problems.

Answer 2

David can you write the complete script in code playground and then send the link? It's hard to debug the way it is now.

Answer 3

Aymane Boukrouh it works!! i cant thank you enough. ive been on this for a few hours. your the best!!

Answer 4

Hi Aymane Boukrouh thanks for your message. heres the link

https://code.sololearn.com/c9S8Lg5c7NqW/#py