tkinter贪吃虫程序编写

Tkinter是Python的一个标准GUI库，可以用于创建图形用户界面。贪吃虫程序是一个经典的小游戏，玩家控制一个虫子在屏幕上移动并吃掉食物，每吃到一个食物，虫子的身体会变长一节。下面是一个简单的Tkinter贪吃虫程序的编写示例：

import tkinter as tk
import random

class SnakeGame(tk.Canvas):
    def __init__(self, master):
        super().__init__(master, width=400, height=400, background="black")
        self.snake_body = [(100, 100), (90, 100), (80, 100)]
        self.food = self.create_food()
        self.direction = "Right"
        self.bind_all("<Key>", self.on_key_press)
        self.score = 0
        self.speed = 150
        self.game_loop()

    def create_food(self):
        while True:
            x = random.randint(1, 39) * 10
            y = random.randint(1, 39) * 10
            if (x, y) not in self.snake_body:
                return self.create_oval(x, y, x+10, y+10, fill="red")

    def move(self):
        head_x, head_y = self.snake_body[0]
        if self.direction == "Up":
            new_head = (head_x, head_y - 10)
        elif self.direction == "Down":
            new_head = (head_x, head_y + 10)
        elif self.direction == "Left":
            new_head = (head_x - 10, head_y)
        else:
            new_head = (head_x + 10, head_y)

        self.snake_body.insert(0, new_head)

        if self.food in self.snake_body:
            self.score += 1
            self.delete(self.food)
            self.food = self.create_food()
            if self.score % 5 == 0:
                self.speed -= 10

        else:
            self.delete(self.snake_body.pop())

        if (new_head[0] < 0 or new_head[0] >= 400 or
            new_head[1] < 0 or new_head[1] >= 400 or
            new_head in self.snake_body[1:]):
            self.game_over()

        else:
            self.create_rectangle(new_head[0], new_head[1],
                                   new_head[0]+10, new_head[1]+10,
                                   fill="green")

    def game_loop(self):
        self.move()
        if not self.game_over_flag:
            self.after(self.speed, self.game_loop)

    def on_key_press(self, event):
        keysyms = event.keysym.lower()
        if keysyms in ["up", "down", "left", "right"]:
            opposite_directions = {"Up": "Down", "Down": "Up",
                                   "Left": "Right", "Right": "Left"}
            if keysyms != opposite_directions[self.direction]:
                self.direction = keysyms

    def game_over(self):
        self.delete(tk.ALL)
        self.create_text(self.winfo_width() / 2, self.winfo_height() / 2,
                         text=f"Game Over! Score: {self.score}",
                         fill="white", font=("Courier", 20), justify=tk.CENTER)

        self.game_over_flag = True

root = tk.Tk()
root.title("Snake Game")
root.resizable(False, False)

game = SnakeGame(root)
game.pack()

root.mainloop()

这个示例代码使用了Tkinter的Canvas组件来创建游戏界面，通过继承Canvas类并重写相关方法来实现贪吃虫游戏的逻辑。玩家可以通过方向键控制虫子的移动方向，当虫子吃到食物时，得分增加并且速度加快。当虫子碰到边界或者自己的身体时，游戏结束。