帮我写一段贪吃蛇的代码

好的，这是用 Python 实现的贪吃蛇游戏代码：

import turtle
import time

# 设置窗口
win = turtle.Screen()
win.title("贪吃蛇")
win.bgcolor("black")
win.setup(width=600, height=600)

# 蛇的头部
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("white")
head.penup()
head.goto(0,0)
head.direction = "stop"

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

# 设置移动函数
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)

# 设置控制函数
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"

# 绑定键盘事件
win.listen()
win.onkeypress(go_up, "Up")
win.onkeypress(go_down, "Down")
win.onkeypress(go_left, "Left")
win.onkeypress(go_right, "Right")

# 主循环
while True:
    win.update()
    
    # 碰到食物
    if head.distance(food) < 20:
        x = food.xcor()
        y = food.ycor()
        food.goto(x, y)
    
    move()
    
    time.sleep(0.1)

win.mainloop()

希望对你有所帮助！