2D Snake Game using Python

2D Snake game using Python

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2D Snake game using Python

#need to install package called pygame
import pygame
import sys
import copy
import random
import time

pygame.init()

width = 500height = 500scale = 10score = 0
food_x = 10food_y = 10
display = pygame.display.set_mode((width, height))
pygame.display.set_caption("Snake Game")
clock = pygame.time.Clock()

background = (23, 32, 42)
snake_colour = (236, 240, 241)
food_colour = (148, 49, 38)
snake_head = (247, 220, 111)


# ----------- Snake Class ----------------class Snake:
    def __init__(self, x_start, y_start):
        self.x = x_start
        self.y = y_start
        self.w = 10        self.h = 10        self.x_dir = 1        self.y_dir = 0        self.history = [[self.x, self.y]]
        self.length = 1
    def reset(self):
        self.x = width/2-scale
        self.y = height/2-scale
        self.w = 10        self.h = 10        self.x_dir = 1        self.y_dir = 0        self.history = [[self.x, self.y]]
        self.length = 1
    def show(self):
        for i in range(self.length):
            if not i == 0:
                pygame.draw.rect(display, snake_colour, (self.history[i][0], self.history[i][1], self.w, self.h))
            else:
                pygame.draw.rect(display, snake_head, (self.history[i][0], self.history[i][1], self.w, self.h))

    def check_eaten(self):
        if abs(self.history[0][0] - food_x) < scale and abs(self.history[0][1] - food_y) < scale:
            return True
    def grow(self):
        self.length += 1        self.history.append(self.history[self.length-2])

    def death(self):
        i = self.length - 1        while i > 0:
            if abs(self.history[0][0] - self.history[i][0]) < self.w and abs(self.history[0][1] - self.history[i][1]) < self.h and self.length > 2:
                return True            i -= 1
    def update(self):
        i = self.length - 1        while i > 0:
            self.history[i] = copy.deepcopy(self.history[i-1])
            i -= 1        self.history[0][0] += self.x_dir*scale
        self.history[0][1] += self.y_dir*scale


# ----------- Food Class --------------class Food:
    def new_location(self):
        global food_x, food_y
        food_x = random.randrange(1, width/scale-1)*scale
        food_y = random.randrange(1, height/scale-1)*scale

    def show(self):
        pygame.draw.rect(display, food_colour, (food_x, food_y, scale, scale))


def show_score():
    font = pygame.font.SysFont("Copperplate Gothic Bold", 20)
    text = font.render("Score: " + str(score), True, snake_colour)
    display.blit(text, (scale, scale))


# ----------- Main Game Loop -------------def gameLoop():
    loop = True
    global score

    snake = Snake(width/2, height/2)
    food = Food()
    food.new_location()

    while loop:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_q:
                    pygame.quit()
                    sys.exit()
                if snake.y_dir == 0:
                    if event.key == pygame.K_UP:
                        snake.x_dir = 0                        snake.y_dir = -1                    if event.key == pygame.K_DOWN:
                        snake.x_dir = 0                        snake.y_dir = 1
                if snake.x_dir == 0:
                    if event.key == pygame.K_LEFT:
                        snake.x_dir = -1                        snake.y_dir = 0                    if event.key == pygame.K_RIGHT:
                        snake.x_dir = 1                        snake.y_dir = 0
        display.fill(background)

        snake.show()
        snake.update()
        food.show()
        show_score()

        if snake.check_eaten():
            food.new_location()
            score += 1            snake.grow()

        if snake.death():
            score = 0            font = pygame.font.SysFont("Copperplate Gothic Bold", 50)
            text = font.render("Game Over!", True, snake_colour)
            display.blit(text, (width/2-50, height/2))
            pygame.display.update()
            time.sleep(3)
            snake.reset()

        if snake.history[0][0] > width:
            snake.history[0][0] = 0        if snake.history[0][0] < 0:
            snake.history[0][0] = width

        if snake.history[0][1] > height:
            snake.history[0][1] = 0        if snake.history[0][1] < 0:
            snake.history[0][1] = height

        pygame.display.update()
        clock.tick(10)

gameLoop()

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