python编写贪吃蛇

好的，下面是一个简单的 Python 贪吃蛇游戏的代码示例：

import pygame
import random

# 初始化 pygame
pygame.init()

# 定义颜色
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)

# 设置屏幕大小
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 400

# 创建屏幕
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("贪吃蛇")

# 定义蛇的初始位置和大小
snake_pos = [100, 50]
snake_body = [[100, 50], [90, 50], [80, 50]]

# 定义食物的初始位置和大小
food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10, random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
food_spawned = 1

# 定义方向
direction = "RIGHT"
change_to = direction

# 定义游戏结束条件
game_over = False

# 定义游戏时钟
clock = pygame.time.Clock()

# 定义字体
font_style = pygame.font.SysFont(None, 30)

# 定义显示分数的函数
def show_score(score):
    score_font = font_style.render("Score: " + str(score), True, WHITE)
    screen.blit(score_font, [0, 0])

# 定义游戏结束的函数
def game_over_msg():
    game_font = font_style.render("Game Over!", True, RED)
    screen.blit(game_font, [SCREEN_WIDTH//3, SCREEN_HEIGHT//3])

# 游戏循环
while not game_over:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True

        # 判断键盘事件
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                change_to = "RIGHT"
            elif event.key == pygame.K_LEFT:
                change_to = "LEFT"
            elif event.key == pygame.K_UP:
                change_to = "UP"
            elif event.key == pygame.K_DOWN:
                change_to = "DOWN"

    # 判断蛇不能掉头
    if change_to == "RIGHT" and direction != "LEFT":
        direction = "RIGHT"
    elif change_to == "LEFT" and direction != "RIGHT":
        direction = "LEFT"
    elif change_to == "UP" and direction != "DOWN":
        direction = "UP"
    elif change_to == "DOWN" and direction != "UP":
        direction = "DOWN"

    # 移动蛇的身体
    if direction == "RIGHT":
        snake_pos[0] += 10
    elif direction == "LEFT":
        snake_pos[0] -= 10
    elif direction == "UP":
        snake_pos[1] -= 10
    elif direction == "DOWN":
        snake_pos[1] += 10

    # 增加蛇的身体长度
    snake_body.insert(0, list(snake_pos))
    if snake_pos == food_pos:
        food_spawned = 0
    else:
        snake_body.pop()

    # 生成新的食物
    if food_spawned == 0:
        food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10, random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
        food_spawned = 1

    # 绘制游戏界面
    screen.fill(BLACK)
    for pos in snake_body:
        pygame.draw.rect(screen, WHITE, pygame.Rect(pos[0], pos[1], 10, 10))

    pygame.draw.rect(screen, RED, pygame.Rect(food_pos[0], food_pos[1], 10, 10))

    if snake_pos[0] < 0 or snake_pos[0] > SCREEN_WIDTH-10:
        game_over = True
    elif snake_pos[1] < 0 or snake_pos[1] > SCREEN_HEIGHT-10:
        game_over = True

    for block in snake_body[1:]:
        if snake_pos == block:
            game_over = True

    show_score(len(snake_body)-3)
    pygame.display.update()

    # 设置游戏帧率
    clock.tick(15)

# 显示游戏结束信息
game_over_msg()

# 等待用户关闭窗口
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

这是一个非常基本的贪吃蛇游戏，你可以根据自己的需求对其进行修改和扩展。