简单的贪食蛇游戏 python+turtle+freegames

就一个python文件，直接上代码：

from turtle import *
from random import randrange
from freegames import square, vector

food = vector(0, 0)
snake = [vector(10, 0)]
aim = vector(0, -10)


def change(x, y):
    # 改变蛇的方向
    aim.x = x
    aim.y = y


# 判断蛇是否在框内,参数head是一个坐标
def inside(head):
    return -200 < head.x < 190 and -200 < head.y < 190


# 主程序
def move():
    head = snake[-1].copy()
    head.move(aim)

    if not inside(head) or head in snake:
        square(head.x, head.y, 9, 'red')
        update()
        return

    snake.append(head)

    if head == food:
        print('Snake', len(snake))
        food.x = randrange(-15, 15) * 10
        food.y = randrange(-15, 15) * 10

    else:
        snake.pop(0)

    clear()

    for body in snake:
        square(body.x, body.y, 9, 'black')

    square(food.x, food.y, 9, 'green')
    update()
    ontimer(move, 300)


def main():
    # 设定游戏框大小
    setup(width=420, height=420, startx=210, starty=210)
    hideturtle()
    tracer(False)
    listen()
    onkey(lambda: change(10, 0), 'Right')
    onkey(lambda: change(-10, 0), 'Left')
    onkey(lambda: change(0, -10), 'Down')
    onkey(lambda: change(0, 10), 'Up')
    move()
    done()
while True:
    main()

功能比较简陋，效果如下图：