使用Python写一个贪吃蛇游戏实例代码

我在程序中加入了分数显示，三种特殊食物，将贪吃蛇的游戏逻辑写到了SnakeGame的类中，而

我在程序中加入了分数显示，三种特殊食物，将贪吃蛇的游戏逻辑写到了SnakeGame的类中，而不是在Snake类中。

特殊食物:

1.绿色：普通，吃了增加体型

2.红色：吃了减少体型

3.金色：吃了回到最初体型

4.变色食物：吃了会根据食物颜色改变蛇的颜色

#coding=UTF-8
from Tkinter import *
from random import randint
import tkMessageBox
class Grid(object):
 def __init__(self, master=None,height=16, width=24, offset=10, grid_width=50, bg="#808080"):
 self.height = height
 self.width = width
 self.offset = offset
 self.grid_width = grid_width
 self.bg = bg
 self.canvas = Canvas(master, width=self.width*self.grid_width+2*self.offset, height=self.height*self.grid_width+
 2*self.offset, bg=self.bg)
 self.canvas.pack(side=RIGHT, fill=Y)
 def draw(self, pos, color, ):
 x = pos[0] * self.grid_width + self.offset
 y = pos[1] * self.grid_width + self.offset
 #outline属性要与网格的背景色（self.bg）相同，要不然会很丑
 self.canvas.create_rectangle(x, y, x + self.grid_width, y + self.grid_width, fill=color, outline=self.bg)
class Food(object):
 def __init__(self, grid, color = "#23D978"):
 self.grid = grid
 self.color = color
 self.set_pos()
 self.type = 1
 def set_pos(self):
 x = randint(0, self.grid.width - 1)
 y = randint(0, self.grid.height - 1)
 self.pos = (x, y)
 def display(self):
 self.grid.draw(self.pos, self.color)
class Snake(object):
 def __init__(self, grid, color = "#000000"):
 self.grid = grid
 self.color = color
 self.body = [(8, 11), (8, 12), (8, 13)]
 self.direction = "Up"
 for i in self.body:
 self.grid.draw(i, self.color)
 #这个方法用于游戏重新开始时初始化贪吃蛇的位置
 def initial(self):
 while not len(self.body) == 0:
 pop = self.body.pop()
 self.grid.draw(pop, self.grid.bg)
 self.body = [(8, 11), (8, 12), (8, 13)]
 self.direction = "Up"
 self.color = "#000000"
 for i in self.body:
 self.grid.draw(i, self.color)
 #蛇像一个指定点移动
 def move(self, new):
 self.body.insert(0, new)
 pop = self.body.pop()
 self.grid.draw(pop, self.grid.bg)
 self.grid.draw(new, self.color)
 #蛇像一个指定点移动，并增加长度
 def add(self ,new):
 self.body.insert(0, new)
 self.grid.draw(new, self.color)
 #蛇吃到了特殊食物1，剪短自身的长度
 def cut_down(self,new):
 self.body.insert(0, new)
 self.grid.draw(new, self.color)
 for i in range(0,3):
 pop = self.body.pop()
 self.grid.draw(pop, self.grid.bg)
 #蛇吃到了特殊食物2，回到最初长度
 def init(self, new):
 self.body.insert(0, new)
 self.grid.draw(new, self.color)
 while len(self.body) > 3:
 pop = self.body.pop()
 self.grid.draw(pop, self.grid.bg)
 #蛇吃到了特殊食物3，改变了自身的颜色,纯属好玩
 def change(self, new, color):
 self.color = color
 self.body.insert(0, new)
 for item in self.body:
 self.grid.draw(item, self.color)
class SnakeGame(Frame):
 def __init__(self, master):
 Frame.__init__(self, master)
 self.grid = Grid(master)
 self.snake = Snake(self.grid)
 self.food = Food(self.grid)
 self.gameover = False
 self.score = 0
 self.status = ['run', 'stop']
 self.speed = 300
 self.grid.canvas.bind_all("<KeyRelease>", self.key_release)
 self.display_food()
 #用于设置变色食物
 self.color_c = ("#FFB6C1","#6A5ACD","#0000FF","#F0FFF0","#FFFFE0","#F0F8FF","#EE82EE","#000000","#5FA8D9","#32CD32")
 self.i = 0
 #界面左侧显示分数
 self.m = StringVar()
 self.ft1 = ('Fixdsys', 40, "bold")
 self.m1 = Message(master, textvariable=self.m, aspect=5000, font=self.ft1, bg="#696969")
 self.m1.pack(side=LEFT, fill=Y)
 self.m.set("Score:"+str(self.score))
 #这个方法用于游戏重新开始时初始化游戏
 def initial(self):
 self.gameover = False
 self.score = 0
 self.m.set("Score:"+str(self.score))
 self.snake.initial()
 #type1:普通食物 type2:减少2 type3:大乐透，回到最初状态 type4:吃了会变色
 def display_food(self):
 self.food.color = "#23D978"
 self.food.type = 1
 if randint(0, 40) == 5:
 self.food.color = "#FFD700"
 self.food.type = 3
 while (self.food.pos in self.snake.body):
 self.food.set_pos()
 self.food.display()
 elif randint(0, 4) == 2:
 self.food.color = "#EE82EE"
 self.food.type = 4
 while (self.food.pos in self.snake.body):
 self.food.set_pos()
 self.food.display()
 elif len(self.snake.body) > 10 and randint(0, 16) == 5:
 self.food.color = "#BC8F8F"
 self.food.type = 2
 while (self.food.pos in self.snake.body):
 self.food.set_pos()
 self.food.display()
 else:
 while (self.food.pos in self.snake.body):
 self.food.set_pos()
 self.food.display()
 def key_release(self, event):
 key = event.keysym
 key_dict = {"Up": "Down", "Down": "Up", "Left": "Right", "Right": "Left"}
 #蛇不可以像自己的反方向走
 if key_dict.has_key(key) and not key == key_dict[self.snake.direction]:
 self.snake.direction = key
 self.move()
 elif key == 'p':
 self.status.reverse()
 def run(self):
 #首先判断游戏是否暂停
 if not self.status[0] == 'stop':
 #判断游戏是否结束
 if self.gameover == True:
 message = tkMessageBox.showinfo("Game Over", "your score: %d" % self.score)
 if message == 'ok':
 self.initial()
 if self.food.type == 4:
 color = self.color_c[self.i]
 self.i = (self.i+1)%10
 self.food.color = color
 self.food.display()
 self.move(color)
 else:
 self.move()
 self.after(self.speed, self.run)
 def move(self, color="#EE82EE"):
 # 计算蛇下一次移动的点
 head = self.snake.body[0]
 if self.snake.direction == 'Up':
 if head[1] - 1 < 0:
 new = (head[0], 16)
 else:
 new = (head[0], head[1] - 1)
 elif self.snake.direction == 'Down':
 new = (head[0], (head[1] + 1) % 16)
 elif self.snake.direction == 'Left':
 if head[0] - 1 < 0:
 new = (24, head[1])
 else:
 new = (head[0] - 1, head[1])
 else:
 new = ((head[0] + 1) % 24, head[1])
 #撞到自己，设置游戏结束的标志位，等待下一循环
 if new in self.snake.body:
 self.gameover=True
 #吃到食物
 elif new == self.food.pos:
 if self.food.type == 1:
 self.snake.add(new)
 elif self.food.type == 2:
 self.snake.cut_down(new)
 elif self.food.type == 4:
 self.snake.change(new, color)
 else:
 self.snake.init(new)
 self.display_food()
 self.score = self.score+1
 self.m.set("Score:" + str(self.score))
 #什么都没撞到，继续前进
 else:
 self.snake.move(new)
if __name__ == '__main__':
 root = Tk()
 snakegame = SnakeGame(root)
 snakegame.run()
 snakegame.mainloop()

总结

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