贪吃蛇游戏代码python

贪吃蛇游戏是一种经典的小游戏，它通过控制一条小蛇在屏幕上移动来吃食物，同时避免碰到墙壁或自身，直到小蛇长度达到一定程度或者游戏失败为止。下面是一个简单的Python版贪吃蛇游戏代码：

import pygame
import random

# 初始化游戏
pygame.init()

# 定义游戏窗口大小
width = 640
height = 480
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Snake Game")

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

# 定义蛇的初始位置和速度
snake_pos = [100, 50]
snake_body = [[100, 50], [90, 50], [80, 50]]
direction = "RIGHT"
change_to = direction
speed = 10

# 定义食物的初始位置
food_pos = [random.randrange(1, width // 10) * 10, random.randrange(1, height // 10) * 10]
food_spawn = True

# 定义分数和字体
score = 0
font_style = pygame.font.SysFont(None, 30)

# 游戏循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        elif 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"

    # 判断方向是否相反
    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"

    # 移动蛇的位置
    if direction == "RIGHT":
        snake_pos += speed
    elif direction == "LEFT":
        snake_pos -= speed
    elif direction == "UP":
        snake_pos -= speed
    elif direction == "DOWN":
        snake_pos += speed

    # 增加蛇的长度和分数
    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, width // 10) * 10, random.randrange(1, height // 10) * 10]
        food_spawn = True

    # 绘制游戏界面
    screen.fill(black)
    for pos in snake_body:
        pygame.draw.rect(screen, white, pygame.Rect(pos, pos, 10, 10))
    pygame.draw.rect(screen, red, pygame.Rect(food_pos, food_pos, 10, 10))

    # 显示分数和更新窗口
    score_font = font_style.render("Score: " + str(score), True, white)
    screen.blit(score_font, [5, 5])
    pygame.display.update()

    # 判断游戏是否结束
    if snake_pos < 0 or snake_pos > width - 10 or snake_pos < 0 or snake_pos > height - 10:
        pygame.quit()
        quit()
    for block in snake_body[1:]:
        if snake_pos == block:
            pygame.quit()
            quit()