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snake.py
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from tkinter import *
import random
GAME_WIDTH=700
GAME_HEIGHT=500
SPEED=150
SPACE_SIZE=50
BODY_PARTS=3
SNAKE_COLOR="#0000FF"
FOOD_COLOR="#FFFF00"
BACKGROUND_COLOR="#000000"
class snake:
def __init__(self):
self.body_size =BODY_PARTS
self.coordinates=[]
self.squares=[]
for i in range(0, BODY_PARTS):
self.coordinates.append([0, 0])
for x, y in self.coordinates:
square=canvas.create_rectangle(x, y, x+SPACE_SIZE, y+SPACE_SIZE,fill=SNAKE_COLOR, tag="snake")
self.squares.append(square)
class Food:
def __init__(self):
x=random.randint(0, (GAME_WIDTH/SPACE_SIZE)-1)*SPACE_SIZE
y=random.randint(0, (GAME_HEIGHT/SPACE_SIZE)-1)*SPACE_SIZE
self.coordinates=[x, y]
canvas.create_oval(x, y, x+ SPACE_SIZE, y+ SPACE_SIZE, fill=FOOD_COLOR, tag="food")
def next_turn(snake, food):
x, y=snake.coordinates[0]
if direction =="up":
y-=SPACE_SIZE
elif direction =="down":
y+=SPACE_SIZE
elif direction =="left":
x-=SPACE_SIZE
elif direction =="right":
x+=SPACE_SIZE
snake.coordinates.insert(0, (x, y))
square=canvas.create_rectangle(x, y, x+SPACE_SIZE, y+SPACE_SIZE,fill=SNAKE_COLOR)
snake.squares.insert(0, square)
if x== food.coordinates[0] and y==food.coordinates[1]:
global score
score+=1
label.config(text="Score:{}".format(score))
canvas.delete("food")
food=Food()
else:
del snake.coordinates[-1]
canvas.delete(snake.squares[-1])
del snake.squares[-1]
if check_collisions(snake):
game_over()
else:
window.after(SPEED, next_turn, snake, food)
def change_direction(new_direction):
global direction
if new_direction =='left':
if direction != 'right':
direction=new_direction
elif new_direction =='right':
if direction != 'left':
direction=new_direction
elif new_direction =='up':
if direction != 'down':
direction=new_direction
elif new_direction =='down':
if direction != 'up':
direction=new_direction
def check_collisions(snake):
x, y=snake.coordinates[0]
if x<0 or x>=GAME_WIDTH:
return True
elif y<0 or y>=GAME_HEIGHT:
return True
for body_part in snake.coordinates[1:]:
if x==body_part[0] and y==body_part[1]:
print("GAME OVER")
return True
return False
def game_over():
canvas.delete(ALL)
canvas.create_text(canvas.winfo_width()/2, canvas.winfo_height()/2,font=('consolas',70), text="GAME OVER", fill="red", tag="gameover")
window=Tk()
window.title("Snake game")
window.resizable(False, False)
score=0
direction='down'
label=Label(window, text="Score:{}".format(score), font=('consolas', 40))
label.pack()
canvas=Canvas(window ,bg=BACKGROUND_COLOR ,height=GAME_HEIGHT, width=GAME_WIDTH)
canvas.pack()
window.update()
window_width =window.winfo_width()
window_height=window.winfo_height()
screen_width=window.winfo_screenwidth()
screen_height=window.winfo_screenheight()
x=int((screen_width/2)-(window_width/2))
y=int((screen_height/2)-(window_height/2))
window.geometry(f"{window_width}x{window_height}+{x}+{y}")
window.bind('<Left>', lambda event: change_direction('left'))
window.bind('<Right>', lambda event: change_direction('right'))
window.bind('<Up>', lambda event: change_direction('up'))
window.bind('<Down>', lambda event: change_direction('down'))
snake=snake()
food=Food()
next_turn(snake, food)
window.mainloop()