用python做一个简单的贪吃蛇

代码： 

import pygame
import random
from pygame.locals import *  # 导入pygame的上下左右键盘输入


class Point:
    row = 0
    col = 0

    def __init__(self, row, col):
        self.row = row
        self.col = col

    def copy(self):
        return Point(self.row, self.col)


pygame.init()  # 创建窗口

w = 800
h = 600
ROW = 30
COL = 40
size = (w, h)
direct = "left"
window = pygame.display.set_mode(size)
pygame.display.set_caption("贪吃蛇")


def rect(point, color):
    w_cell = w / COL
    h_cell = h / ROW
    left = point.col * w_cell
    top = point.row * h_cell
    pygame.draw.rect(window, color, (left, top, w_cell, h_cell))


def food_exist():
    is_in = False
    while True:
        pos = Point(random.randint(0, ROW - 1), random.randint(0, COL - 1))
        if pos.row == head.row and pos.col == head.col:
            is_in = True
        for snake in snakes:
            if pos.row == snake.row and pos.col == snake.col:
                is_in = True
        if not is_in:
            break
    return pos


quit = True
clock = pygame.time.Clock()
head = Point(ROW / 2, COL / 2)
snakes = [Point(head.row, head.col + 1),
          Point(head.row, head.col + 2),
          Point(head.row, head.col + 3)]
food = food_exist()
head_color = (0, 128, 128)
food_color = (255, 255, 0)
bk_color = (255, 255, 255)
snake_color = (200, 200, 200)

while quit:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            quit = False
        elif event.type == pygame.KEYDOWN:
            print(event)
            if event.key == K_LEFT:
                if direct == "up" or direct == "down":
                    direct = "left"
            elif event.key == K_RIGHT:
                if direct == "up" or direct == "down":
                    direct = "right"
            elif event.key == K_UP:
                if direct == "right" or direct == "left":
                    direct = "up"
            elif event.key == K_DOWN:
                if direct == "right" or direct == "left":
                    direct = "down"
    dead = False
    if head.row < 0 or head.col < 0 or head.row > ROW or head.col > COL:
        print("你操作的这条蛇没了！")
        dead = True
    for snake in snakes:
        if head.row == snake.row and head.col == snake.col:
            print("你操作的这条蛇没了！")
            dead = True
    if dead:
        break

    eat = (head.row == food.row and head.col == food.col)
    snakes.insert(0, head.copy())

    if eat:
        food = food_exist()
    else:
        snakes.pop()

    if direct == "left":
        head.col -= 1
    if direct == "down":
        head.row += 1
    if direct == "up":
        head.row -= 1
    if direct == "right":
        head.col += 1
    pygame.draw.rect(window, bk_color, (0, 0, w, h))

    rect(head, head_color)
    rect(food, food_color)
    # 生成蛇身体

    for snake in snakes:
        rect(snake, snake_color)
    pygame.display.update()
    clock.tick(20)

这个是比较简单的呢，