Snake game example written in Python_python

This article mainly introduces the example of the Snake game written in Python. It is a hands-on work that is fun and can learn something. Friends who need it can refer to it

This is the first time to write this kind of comparison in Python It’s practical and fun, just practice it

Game instructions:

* P key controls “pause/start”
* Arrow keys control the direction of the snake

The source code is as follows:

Copy code The code is as follows:

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()

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