snake.py
from turtle import Turtle
STARTING_POSITIONS = [(0, 0), (-20, 0), (-40, 0)]
MOVE_DISTANCE = 20
UP = 90
DOWN = 270
LEFT = 180
RIGHT = 0
class Snake:
def __init__(self):
self.segments = []
self.create_snake()
self.head = self.segments[0]
def create_snake(self):
for position in STARTING_POSITIONS:
self.add_segment(position)
def add_segment(self, position):
new_segment = Turtle("square")
new_segment.color("white")
new_segment.penup()
new_segment.goto(position)
self.segments.append(new_segment)
def extend(self):
self.add_segment(self.segments[-1].position())
def move(self):
for seg_num in range(len(self.segments) - 1, 0, -1):
new_x = self.segments[seg_num - 1].xcor()
new_y = self.segments[seg_num - 1].ycor()
self.segments[seg_num].goto(new_x, new_y)
self.head.forward(MOVE_DISTANCE)
def up(self):
if self.head.heading() != DOWN:
self.head.setheading(UP)
def down(self):
if self.head.heading() != UP:
self.head.setheading(DOWN)
def left(self):
if self.head.heading() != RIGHT:
self.head.setheading(LEFT)
def right(self):
if self.head.heading() != LEFT:
self.head.setheading(RIGHT)
food.py
from turtle import Turtle
import random
class Food(Turtle):
def __init__(self):
super().__init__()
self.shape("circle")
self.penup()
self.shapesize(stretch_len=0.5, stretch_wid=0.5)
self.color("blue")
self.speed("fastest")
self.refresh()
def refresh(self):
random_x = random.randint(-280, 280)
random_y = random.randint(-280, 280)
self.goto(random_x, random_y)
scoreboard.py
from turtle import Turtle
ALIGNMENT = "center"
FONT = ("Courier", 24, "normal")
class Scoreboard(Turtle):
def __init__(self):
super().__init__()
self.score = 0
with open("data.txt") as data:
self.high_score = int(data.read())
self.color("white")
self.penup()
self.goto(0, 270)
self.hideturtle()
self.update_scoreboard()
def update_scoreboard(self):
self.clear()
self.write(f"Score: {self.score} High Score: {self.high_score}", align=ALIGNMENT, font=FONT)
def reset(self):
if self.score > self.high_score:
self.high_score = self.score
with open("data.txt", mode="w") as data:
data.write(f"{self.high_score}")
self.score = 0
self.update_scoreboard()
def increase_score(self):
self.score += 1
self.update_scoreboard()
def game_over(self):
self.goto(0, 0)
self.write("GAME OVER", align=ALIGNMENT, font=FONT)
self.reset()
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("My Snake Game")
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:
if segment == snake.head:
pass
elif snake.head.distance(segment) < 10:
game_is_on = False
scoreboard.game_over()
screen.exitonclick()
data.txt
0
