Snake game using python pygame.

Project Name:- Snake Game using python pygame.

Dependencies:-
                            1)Install pygame-

link- https://askubuntu.com/questions/399824/how-to-install-pygame

                            2)Install random-

                   python3- pip3 install random
                   python2- pip install random



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import pygame
import random
pygame.init()




game_window = pygame.display.set_mode((900, 900))
pygame.display.set_caption("GJ_Snake_game")




white=(255,255,255)
red=(255,0,0)
black=(0,0,0)


def score_text(text,a,b):
    font = pygame.font.SysFont(None, 50)
    screen_text = font.render(text, True, red)
    game_window.blit(screen_text, [a,b])



def gameover(highscore):
    with open("high.txt", "w") as f:
        f.write(str(highscore))
    game_window.fill(white)
    score_text("Game Over", 330, 400)
    score_text("Enter Spacebar to Restart", 250, 440)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                pygame.mixer.music.load('back.mp3')
                pygame.mixer.music.play()
                gameloop()
    pygame.display.update()


def gameloop():

    game_exit = False    x = 20    y = 30    snake_size = 20    score = 0
    velocity_x = 5    velocity_y = 5    snake_list = []
    lenght = 1    highscore=0    try:
        with open("high.txt", "r") as f:
            highscore = f.read()
    except:
        with open("high.txt","w") as f:
            f.write(str(highscore))

    food_x = random.randint(20, 800)
    food_y = random.randint(20, 800)

    clock = pygame.time.Clock()
    fps = 35    while not game_exit:

        for event in pygame.event.get():
            if event.type==pygame.QUIT:
                game_exit=True
            if event.type==pygame.KEYDOWN:
                if event.key==pygame.K_RIGHT:
                    velocity_x=5                    velocity_y=0                if event.key == pygame.K_LEFT:
                    velocity_x=-5                    velocity_y=0                if event.key == pygame.K_UP:
                    velocity_x=0                    velocity_y=-5                if event.key == pygame.K_DOWN:
                    velocity_x=0                    velocity_y=5
        x=x+velocity_x
        y=y+velocity_y


        if abs(x-food_x)<10 and abs(y-food_y)<10:
           food_x = random.randint(10, 800)
           food_y=random.randint(10,800)
           score=score+10           lenght+=5
        game_window.fill(white)



        score_text("Score:" + str(score)+" Highscore:"+str(highscore),5,5)
        if score>=int(highscore):
            highscore=score



        head = []
        head.append(x)
        head.append(y)
        snake_list.append(head)
        if len(snake_list)>lenght:
            del snake_list[0]

        for p, q in snake_list:
            pygame.draw.rect(game_window,black,(p,q,snake_size,snake_size))


        pygame.draw.rect(game_window,red,(food_x,food_y,snake_size,snake_size))



        if x<0 or y<0 or x>900 or y>900 :
          gameover(highscore)

        if head in snake_list[:-1]:
          score=score-5

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

    pygame.quit()
    quit()


start=Truewhile  start:
        game_window.fill(white)
        score_text("Wel-come to Snake game",250,400)
        score_text("Enter bar to start game",270,440)
        for event in pygame.event.get():
            if event.type==pygame.QUIT:
                start=False            if event.type==pygame.KEYDOWN:
                if event.key==pygame.K_SPACE:
                    gameloop()
        pygame.display.update()

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