Python写的贪吃蛇游戏例子_python

from Tkinter import *
import tkMessageBox,sys
from random import randint
class Grid(object):
 def __init__(self,master=None,window_width=800,window_height=600,grid_width=50,offset=10):
 self.height = window_height
 self.width = window_width
 self.grid_width = grid_width
 self.offset = offset
 self.grid_x = self.width/self.grid_width
 self.grid_y = self.height/self.grid_width
 self.bg = "#EBEBEB"
 self.canvas = Canvas(master, width=self.width+2*self.offset, height=self.height+2*self.offset, bg=self.bg)
 self.canvas.pack()
 self.grid_list()
 def draw(self, pos, color,):
 x = pos[0]*self.grid_width + self.offset
 y = pos[1]*self.grid_width + self.offset
 self.canvas.create_rectangle(x, y, x+self.grid_width, y+self.grid_width,fill=color,outline=self.bg)
 def grid_list(self):
 grid_list = []
 for y in range(0,self.grid_y):
 for x in range(0,self.grid_x):
 grid_list.append((x,y))
 self.grid_list = grid_list

class Food(object):
 def __init__(self, Grid):
 self.grid = Grid
 self.color = "#23D978" 
 self.set_pos()
 def set_pos(self):
 x = randint(0,self.grid.grid_x - 1)
 y = randint(0,self.grid.grid_y - 1)
 self.pos = (x, y) 
 def display(self):
 self.grid.draw(self.pos,self.color)

class Snake(object):
 def __init__(self, Grid):
 self.grid = Grid
 self.body = [(10,6),(10,7),(10,8)]
 self.direction = "Up"
 self.status = ['run','stop']
 self.speed = 300
 self.color = "#5FA8D9" 
 self.food = Food(self.grid)
 self.display_food()
 self.gameover = False
 self.score = 0
 def available_grid(self):
 return [i for i in self.grid.grid_list if i not in self.body[2:]]
 def change_direction(self, direction):
 self.direction = direction
 def display(self):
 for (x,y) in self.body:
 self.grid.draw((x,y),self.color)
 def display_food(self):
 while(self.food.pos in self.body):
 self.food.set_pos()
 self.food.display()
 def move(self):
 head = self.body[0]
 if self.direction == 'Up':
 new = (head[0], head[1]-1)
 elif self.direction == 'Down':
 new = (head[0], head[1]+1)
 elif self.direction == 'Left':
 new = (head[0]-1,head[1])
 else:
 new = (head[0]+1,head[1])
 if not self.food.pos == head: 
 pop = self.body.pop()
 self.grid.draw(pop,self.grid.bg)
 else:
 self.display_food()
 self.score += 1
 self.body.insert(0,new) 
 if not new in self.available_grid():
 self.status.reverse() 
 self.gameover = True
 else:
 self.grid.draw(new,color=self.color)

class SnakeGame(Frame):
 def __init__(self,master=None, *args, **kwargs):
 Frame.__init__(self, master)
 self.master = master
 self.grid = Grid(master=master,*args, **kwargs)
 self.snake = Snake(self.grid)
 self.bind_all("", self.key_release)
 self.snake.display()
 def run(self):
 if not self.snake.status[0] == 'stop':
 self.snake.move()
 if self.snake.gameover == True:
 message = tkMessageBox.showinfo("Game Over", "your score: %d" % self.snake.score)
 if message == 'ok':
 sys.exit()
 self.after(self.snake.speed,self.run)
 def key_release(self, event):
 key = event.keysym
 key_dict = {"Up":"Down","Down":"Up","Left":"Right","Right":"Left"}
 if key_dict.has_key(key) and not key == key_dict[self.snake.direction]:
 self.snake.change_direction(key)
 self.snake.move()
 elif key == 'p':
 self.snake.status.reverse()

if __name__ == '__main__':
 root = Tk()
 snakegame = SnakeGame(root)
 snakegame.run()
 snakegame.mainloop()