Python turtle实现贪吃蛇游戏

# Simple Snake Game in Python 3 for Beginners
 
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 @TokyoEdTech\")
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, \"Up\")
wn.onkeypress(go_down, \"Down\")
wn.onkeypress(go_left, \"Left\")
wn.onkeypress(go_right, \"Right\")
 
# 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()