用python设计一个贪吃蛇游戏，贪吃蛇可以掉头，也可以斜着走

以下是一个基本的贪吃蛇游戏，可以掉头和斜着走。使用Python的turtle模块进行绘图。

import turtle
import random

# 设置窗口大小
screen = turtle.Screen()
screen.setup(600, 600)
screen.bgcolor('black')
screen.title('贪吃蛇')

# 创建蛇头及身体列表
head = turtle.Turtle()
head.shape('square')
head.color('green')
head.penup()
head.speed(0)
head.goto(0, 0)
head.direction = 'stop'

body = []

# 创建食物
food = turtle.Turtle()
food.shape('circle')
food.color('red')
food.penup()
food.speed(0)
food.goto(random.randint(-280, 280), random.randint(-280, 280))

# 创建分数
score = 0
score_pen = turtle.Turtle()
score_pen.speed(0)
score_pen.color('white')
score_pen.penup()
score_pen.hideturtle()
score_pen.goto(0, 260)
score_pen.write('Score: {}'.format(score), align='center', font=('Courier', 24, 'normal'))

# 定义移动函数
def move():
    if head.direction == 'up':
        y = head.ycor()
        head.sety(y + 20)
    elif head.direction == 'down':
        y = head.ycor()
        head.sety(y - 20)
    elif head.direction == 'right':
        x = head.xcor()
        head.setx(x + 20)
    elif head.direction == 'left':
        x = head.xcor()
        head.setx(x - 20)
    elif head.direction == 'upright':
        x = head.xcor()
        y = head.ycor()
        head.goto(x + 20, y + 20)
    elif head.direction == 'upleft':
        x = head.xcor()
        y = head.ycor()
        head.goto(x - 20, y + 20)
    elif head.direction == 'downright':
        x = head.xcor()
        y = head.ycor()
        head.goto(x + 20, y - 20)
    elif head.direction == 'downleft':
        x = head.xcor()
        y = head.ycor()
        head.goto(x - 20, y - 20)

# 定义移动方向函数
def go_up():
    if head.direction != 'down':
        head.direction = 'up'

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

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

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

def go_upright():
    if head.direction != 'downleft':
        head.direction = 'upright'

def go_upleft():
    if head.direction != 'downright':
        head.direction = 'upleft'

def go_downright():
    if head.direction != 'upleft':
        head.direction = 'downright'

def go_downleft():
    if head.direction != 'upright':
        head.direction = 'downleft'

# 监听键盘事件
screen.listen()
screen.onkeypress(go_up, 'Up')
screen.onkeypress(go_down, 'Down')
screen.onkeypress(go_right, 'Right')
screen.onkeypress(go_left, 'Left')
screen.onkeypress(go_upright, 'w')
screen.onkeypress(go_upleft, 'q')
screen.onkeypress(go_downright, 'x')
screen.onkeypress(go_downleft, 'z')

# 游戏循环
while True:
    screen.update()

    # 判断是否吃到食物
    if head.distance(food) < 20:
        food.goto(random.randint(-280, 280), random.randint(-280, 280))

        # 添加新的身体
        new_body = turtle.Turtle()
        new_body.shape('square')
        new_body.color('light green')
        new_body.penup()
        new_body.speed(0)
        body.append(new_body)

        # 增加分数
        score += 10
        score_pen.clear()
        score_pen.write('Score: {}'.format(score), align='center', font=('Courier', 24, 'normal'))

    # 移动身体
    for i in range(len(body) - 1, 0, -1):
        x = body[i - 1].xcor()
        y = body[i - 1].ycor()
        body[i].goto(x, y)

    if len(body) > 0:
        x = head.xcor()
        y = head.ycor()
        body[0].goto(x, y)

    # 判断是否碰到墙壁或者身体
    if head.xcor() > 290 or head.xcor() < -290 or head.ycor() > 290 or head.ycor() < -290:
        score_pen.clear()
        score_pen.write('Game Over', align='center', font=('Courier', 24, 'normal'))
        break

    for b in body:
        if b.distance(head) < 20:
            score_pen.clear()
            score_pen.write('Game Over', align='center', font=('Courier', 24, 'normal'))
            break

    # 移动蛇头
    move()

turtle.done()

运行代码，即可开始游戏。按上下左右和斜向的w、q、x、z键控制蛇的移动方向。吃到食物会增加分数，碰到墙壁或蛇身会游戏结束。