python贪吃蛇代码

以下是一个简单的Python贪吃蛇游戏代码：

import pygame
import random

# 初始化Pygame
pygame.init()

# 定义窗口大小
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 600

# 定义贪吃蛇速度
SNAKE_SPEED = 15

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

# 创建窗口
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Snake Game")

# 定义贪吃蛇初始位置和长度
snake_pos = [300, 300]
snake_body = [[300, 300], [290, 300], [280, 300]]

# 定义食物初始位置
food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10,
            random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
food_spawn = True

# 定义运动方向
direction = "RIGHT"
change_to = direction

# 定义分数
score = 0

# 定义字体
font = pygame.font.SysFont('arial', 25)

# 定义游戏结束函数
def game_over():
    font1 = pygame.font.SysFont('arial', 50)
    line1 = font1.render("Game Over!", True, RED)
    line2 = font1.render("Your final score is: " + str(score), True, WHITE)
    screen.blit(line1, (SCREEN_WIDTH/3, SCREEN_HEIGHT/3))
    screen.blit(line2, (SCREEN_WIDTH/3, SCREEN_HEIGHT/2))
    pygame.display.update()
    pygame.time.wait(3000)
    pygame.quit()
    quit()

# 游戏循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                change_to = "LEFT"
            elif event.key == pygame.K_RIGHT:
                change_to = "RIGHT"
            elif event.key == pygame.K_UP:
                change_to = "UP"
            elif event.key == pygame.K_DOWN:
                change_to = "DOWN"
            elif event.key == pygame.K_ESCAPE:
                pygame.quit()
                quit()

    # 判断运动方向是否合法
    if change_to == "LEFT" and direction != "RIGHT":
        direction = "LEFT"
    elif change_to == "RIGHT" and direction != "LEFT":
        direction = "RIGHT"
    elif change_to == "UP" and direction != "DOWN":
        direction = "UP"
    elif change_to == "DOWN" and direction != "UP":
        direction = "DOWN"

    # 根据方向更新贪吃蛇位置
    if direction == "LEFT":
        snake_pos[0] -= 10
    elif direction == "RIGHT":
        snake_pos[0] += 10
    elif direction == "UP":
        snake_pos[1] -= 10
    elif direction == "DOWN":
        snake_pos[1] += 10

    # 更新贪吃蛇身体
    snake_body.insert(0, list(snake_pos))
    if snake_pos == food_pos:
        food_spawn = False
        score += 10
    else:
        snake_body.pop()

    # 重新生成食物
    if not food_spawn:
        food_pos = [random.randrange(1, (SCREEN_WIDTH//10)) * 10,
                    random.randrange(1, (SCREEN_HEIGHT//10)) * 10]
        food_spawn = True

    # 绘制背景
    screen.fill(BLACK)

    # 绘制贪吃蛇身体
    for pos in snake_body:
        pygame.draw.rect(screen, WHITE, pygame.Rect(
            pos[0], pos[1], 10, 10))

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

    # 绘制分数
    score_font = font.render("Score: " + str(score), True, WHITE)
    screen.blit(score_font, (0, 0))

    # 判断贪吃蛇是否撞墙
    if snake_pos[0] < 0 or snake_pos[0] > SCREEN_WIDTH-10:
        game_over()
    elif snake_pos[1] < 0 or snake_pos[1] > SCREEN_HEIGHT-10:
        game_over()

    # 判断贪吃蛇是否撞到自己
    for block in snake_body[1:]:
        if snake_pos == block:
            game_over()

    # 更新屏幕
    pygame.display.update()

    # 控制游戏速度
    pygame.time.Clock().tick(SNAKE_SPEED)

这个代码实现了一个基本的贪吃蛇游戏，运行后可以使用方向键控制贪吃蛇的运动方向，吃到食物后会增加分数并且重新生成食物。当贪吃蛇撞墙或者撞到自己时游戏结束，并且显示最终得分。