Python to Snake Game with Full Source Code For Beginners

Source Code:

snake_game.py

from tkinter import * import random GAME_WIDTH = 700 GAME_HEIGHT = 700 SPEED = 100 SPACE_SIZE = 50 BODY_PARTS = 3 SNAKE_COLOR = "#00FF00" FOOD_COLOR = "#FF0000" 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]: 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()
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