Simple Snake Game in Python 3

By @SomShreya

import turtle import time import random

delay = 0.1

Score

score = 0 high_score = 0

Set up the screen

wn = turtle.Screen() wn.title("Snake Game by @SomShreya") wn.bgcolor("green") wn.setup(width=600, height=600) wn.tracer(0) # Turns off the screen updates

Snake head

head = turtle.Turtle() head.speed(0) head.shape("square") head.color("black") head.penup() head.goto(0,0) head.direction = "stop"

Snake food

food = turtle.Turtle() food.speed(0) food.shape("circle") food.color("red") food.penup() food.goto(0,100)

segments = []

Pen

pen = turtle.Turtle() pen.speed(0) pen.shape("square") pen.color("white") pen.penup() pen.hideturtle() pen.goto(0, 260) pen.write("Score: 0 High Score: 0", align="center", font=("Courier", 24, "normal"))

Functions

def go_up(): if head.direction != "down": head.direction = "up"

def go_down(): if head.direction != "up": head.direction = "down"

def go_left(): if head.direction != "right": head.direction = "left"

def go_right(): if head.direction != "left": head.direction = "right"

def move(): if head.direction == "up": y = head.ycor() head.sety(y + 20)

if head.direction == "down":
    y = head.ycor()
    head.sety(y - 20)

if head.direction == "left":
    x = head.xcor()
    head.setx(x - 20)

if head.direction == "right":
    x = head.xcor()
    head.setx(x + 20)

Keyboard bindings

wn.listen() wn.onkeypress(go_up, "w") wn.onkeypress(go_down, "s") wn.onkeypress(go_left, "a") wn.onkeypress(go_right, "d")

Main game loop

while True: wn.update()

# Check for a collision with the border
if head.xcor()>290 or head.xcor()<-290 or head.ycor()>290 or head.ycor()<-290:
    time.sleep(1)
    head.goto(0,0)
    head.direction = "stop"

    # Hide the segments
    for segment in segments:
        segment.goto(1000, 1000)
    
    # Clear the segments list
    segments.clear()

    # Reset the score
    score = 0

    # Reset the delay
    delay = 0.1

    pen.clear()
    pen.write("Score: {}  High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal")) 


# Check for a collision with the food
if head.distance(food) < 20:
    # Move the food to a random spot
    x = random.randint(-290, 290)
    y = random.randint(-290, 290)
    food.goto(x,y)

    # Add a segment
    new_segment = turtle.Turtle()
    new_segment.speed(0)
    new_segment.shape("square")
    new_segment.color("grey")
    new_segment.penup()
    segments.append(new_segment)

    # Shorten the delay
    delay -= 0.001

    # Increase the score
    score += 10

    if score > high_score:
        high_score = score
    
    pen.clear()
    pen.write("Score: {}  High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal")) 

# Move the end segments first in reverse order
for index in range(len(segments)-1, 0, -1):
    x = segments[index-1].xcor()
    y = segments[index-1].ycor()
    segments[index].goto(x, y)

# Move segment 0 to where the head is
if len(segments) > 0:
    x = head.xcor()
    y = head.ycor()
    segments[0].goto(x,y)

move()    

# Check for head collision with the body segments
for segment in segments:
    if segment.distance(head) < 20:
        time.sleep(1)
        head.goto(0,0)
        head.direction = "stop"
    
        # Hide the segments
        for segment in segments:
            segment.goto(1000, 1000)
    
        # Clear the segments list
        segments.clear()

        # Reset the score
        score = 0

        # Reset the delay
        delay = 0.1
    
        # Update the score display
        pen.clear()
        pen.write("Score: {}  High Score: {}".format(score, high_score), align="center", font=("Courier", 24, "normal"))

time.sleep(delay)

wn.mainloop()