Python 贪吃蛇游戏代码示例 - 简单易懂

以下是 Python 语言的贪吃蛇代码示例：

import pygame
import random

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

# 定义方向
UP = 0
DOWN = 1
LEFT = 2
RIGHT = 3

# 初始化pygame
pygame.init()

# 设置屏幕大小
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('贪吃蛇')

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

# 定义蛇类
class Snake():
    def __init__(self):
        self.head = [SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2]
        self.body = [[self.head[0], self.head[1] + 10],
                     [self.head[0], self.head[1] + 20],
                     [self.head[0], self.head[1] + 30]]
        self.direction = UP

    def move(self):
        if self.direction == UP:
            self.head[1] -= 10
        elif self.direction == DOWN:
            self.head[1] += 10
        elif self.direction == LEFT:
            self.head[0] -= 10
        elif self.direction == RIGHT:
            self.head[0] += 10

        self.body.insert(0, list(self.head))

        if self.head == food.food_pos:
            food.generate_food()
        else:
            self.body.pop()

    def change_direction(self, direction):
        if direction == LEFT and self.direction != RIGHT:
            self.direction = LEFT
        elif direction == RIGHT and self.direction != LEFT:
            self.direction = RIGHT
        elif direction == UP and self.direction != DOWN:
            self.direction = UP
        elif direction == DOWN and self.direction != UP:
            self.direction = DOWN

    def check_collision(self):
        if self.head[0] >= SCREEN_WIDTH or self.head[0] < 0 or self.head[1] >= SCREEN_HEIGHT or self.head[1] < 0:
            return True

        for block in self.body[1:]:
            if self.head == block:
                return True

        return False

    def draw(self, screen):
        for block in self.body:
            pygame.draw.rect(screen, GREEN, [block[0], block[1], 10, 10])

# 定义食物类
class Food():
    def __init__(self):
        self.food_pos = [0, 0]
        self.generate_food()

    def generate_food(self):
        self.food_pos = [random.randrange(0, SCREEN_WIDTH // 10) * 10,
                         random.randrange(0, SCREEN_HEIGHT // 10) * 10]

    def draw(self, screen):
        pygame.draw.rect(screen, RED, [self.food_pos[0], self.food_pos[1], 10, 10])

# 初始化蛇和食物
snake = Snake()
food = Food()

# 定义游戏循环
clock = pygame.time.Clock()
score = 0

while True:
    clock.tick(20)
    screen.fill(WHITE)

    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:
                snake.change_direction(LEFT)
            elif event.key == pygame.K_RIGHT:
                snake.change_direction(RIGHT)
            elif event.key == pygame.K_UP:
                snake.change_direction(UP)
            elif event.key == pygame.K_DOWN:
                snake.change_direction(DOWN)

    snake.move()
    if snake.check_collision():
        pygame.quit()
        quit()

    snake.draw(screen)
    food.draw(screen)

    # 显示得分
    text = font.render('Score: ' + str(score), True, BLACK)
    screen.blit(text, [0, 0])

    # 更新屏幕
    pygame.display.update()

    # 检查是否吃到食物
    if snake.head == food.food_pos:
        score += 10