main.py

from turtle import Screen
from snake import Snake
from food import Food
from scoreboard import Scoreboard
import time

screen = Screen()
screen.setup(width=600, height=600)
screen.bgcolor("black")
screen.title("Python Snake")
screen.tracer(0)

snake = Snake()
food = Food()
scoreboard = Scoreboard()

screen.listen()
screen.onkey(snake.up, "Up")
screen.onkey(snake.down, "Down")
screen.onkey(snake.left, "Left")
screen.onkey(snake.right, "Right")

game_is_on = True 
while game_is_on:
    screen.update()
    time.sleep(0.1)
    snake.move()
    
    #detect collision with food
    if snake.head.distance(food) < 15:
       food.refresh()
       snake.extend()
       scoreboard.increase_score()
       
    #detect collision with wall
    if snake.head.xcor() > 280 or snake.head.xcor() < -280 or snake.head.ycor() > 280 or snake.head.ycor() < -280:
        game_is_on = False
        scoreboard.game_over()
        
    #detect collision with tail
    for segment in snake.segments[1:]:
        if snake.head.distance(segment) < 10:
            game_is_on = False
            scoreboard.game_over()
                 
screen.exitonclick()