pycharm编写贪吃蛇小游戏

好的，下面是一个简单的贪吃蛇小游戏的代码实现，使用PyCharm编写：

import random
import pygame
from pygame.locals import *

# 定义颜色变量
black = pygame.Color(0, 0, 0)
white = pygame.Color(255, 255, 255)
red = pygame.Color(255, 0, 0)
green = pygame.Color(0, 255, 0)
blue = pygame.Color(0, 0, 255)

# 定义游戏结束函数
def game_over():
    pygame.quit()
    sys.exit()

# 定义主函数
def main():
    # 初始化pygame
    pygame.init()

    # 设置游戏窗口大小和标题
    play_surface = pygame.display.set_mode((640, 480))
    pygame.display.set_caption('贪吃蛇')

    # 初始化变量
    snake_position = [100, 100]
    snake_body = [[100, 100], [80, 100], [60, 100]]
    food_position = [300, 300]
    food_spawned = 1
    direction = 'RIGHT'
    change_direction_to = direction
    score = 0

    # 定义计时器
    fps_controller = pygame.time.Clock()

    # 开始游戏主循环
    while True:
        # 监听事件
        for event in pygame.event.get():
            if event.type == QUIT:
                game_over()
            elif event.type == KEYDOWN:
                if event.key == K_RIGHT or event.key == ord('d'):
                    change_direction_to = 'RIGHT'
                if event.key == K_LEFT or event.key == ord('a'):
                    change_direction_to = 'LEFT'
                if event.key == K_UP or event.key == ord('w'):
                    change_direction_to = 'UP'
                if event.key == K_DOWN or event.key == ord('s'):
                    change_direction_to = 'DOWN'
                if event.key == K_ESCAPE:
                    pygame.event.post(pygame.event.Event(QUIT))

        # 判断是否改变方向
        if change_direction_to == 'RIGHT' and not direction == 'LEFT':
            direction = 'RIGHT'
        if change_direction_to == 'LEFT' and not direction == 'RIGHT':
            direction = 'LEFT'
        if change_direction_to == 'UP' and not direction == 'DOWN':
            direction = 'UP'
        if change_direction_to == 'DOWN' and not direction == 'UP':
            direction = 'DOWN'

        # 根据方向移动蛇头
        if direction == 'RIGHT':
            snake_position[0] += 20
        if direction == 'LEFT':
            snake_position[0] -= 20
        if direction == 'UP':
            snake_position[1] -= 20
        if direction == 'DOWN':
            snake_position[1] += 20

        # 增加蛇身
        snake_body.insert(0, list(snake_position))
        if snake_position[0] == food_position[0] and snake_position[1] == food_position[1]:
            food_spawned = 0
            score += 1
        else:
            snake_body.pop()

        # 生成食物
        if food_spawned == 0:
            food_position = [random.randrange(1, 32) * 20, random.randrange(1, 24) * 20]
            food_spawned = 1

        # 绘制游戏界面
        play_surface.fill(black)
        for position in snake_body:
            pygame.draw.rect(play_surface, green, Rect(position[0], position[1], 20, 20))
        pygame.draw.rect(play_surface, white, Rect(food_position[0], food_position[1], 20, 20))

        # 刷新游戏界面
        pygame.display.flip()

        # 判断游戏是否结束
        if snake_position[0] < 0 or snake_position[0] > 620:
            game_over()
        if snake_position[1] < 0 or snake_position[1] > 460:
            game_over()
        for block in snake_body[1:]:
            if snake_position[0] == block[0] and snake_position[1] == block[1]:
                game_over()

        # 控制游戏帧率
        fps_controller.tick(10)

if __name__ == '__main__':
    main()

运行以上代码，即可开始游戏，使用方向键或wasd键控制蛇的移动方向，吃到食物加分，碰到边界或自身游戏结束。