Not sure how to implement bullets into Pong Game

Question

I want to implement bullets into my pong game in which my paddles can shoot out bullets. Right now, I just want to focus on the PlayerPaddle shooting out bullets that travel towards the right. These bullets would originate from the position of the paddle. However, I'm not sure how to approach this. I believe that making a sprite group would overcomplicate my project and I just want my bullets to be able to collide into the pong ball I have eventually. This is what I have so far.

class PlayerPaddle(Image):

    def __init__(self, screen_size, width, height, filename, color=(255,0,0)):

        # speed and direction have to be before super() 
        self.speed = 3
        self.direction = 0

        super().__init__(screen_size, width, height, filename, color=(255, 0, 0))

        self.rect.centerx = 40
        self.rect.centery = screen_size[1] // 2

        self.rect.height = 100 

    def update(self):

        self.rect.centery += self.direction*self.speed   # <--- use directly rect.centery 

        super().update()

        #self.rect.center = (self.centerx, self.centery) # <-- don't need it 

        if self.rect.top < 0:
            self.rect.top = 0

        if self.rect.bottom > self.screen_size[1]-1:
            self.rect.bottom = self.screen_size[1]-1


    def handle_event(self, event):
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                self.direction = -1
            elif event.key == pygame.K_DOWN:
                self.direction = 1      
            elif event.key == pygame.K_LEFT:
                self.turnLeft()
            elif event.key == pygame.K_RIGHT:
                self.turnRight()
            elif event.key == pygame.K_u:
                bullet = Bullet(screen_size, 5, 5, "naruto.png", color = (255, 0 , 0))
                bullet.rect.centerx = self.rect.centerx
                bullet.rect.centery = self.rect.centery 
                bullet.draw()
                bullet.update()


        if event.type == pygame.KEYUP:
            if event.key == pygame.K_UP and self.direction == -1:
                self.direction = 0
            elif event.key == pygame.K_DOWN and self.direction == 1:
                self.direction = 0 

and Here is my bullet class

class Bullet(Image):

    def __init__(self, screen_size, width, height, filename, color = (255, 0, 0)):

        super().__init__(screen_size, width, height, filename, color = (255, 0, 0))

    def update(self):

        self.rect.centery -= 3

Answer 1

I would create Group() outside PlayerPaddle()

self.bullets_group = pygame.sprite.Group()

and use it as argument in PlayerPaddle()

self.player_paddle = PlayerPaddle(..., self.bullets_group)

This way player can easly add bullets to group

   elif event.key == pygame.K_u:
       bullet = Bullet(screen_size, 5, 5, "naruto.png", color = (255, 0 , 0))
       bullet.rect.centerx = self.rect.centerx
       bullet.rect.centery = self.rect.centery 

       self.bullets_group.add(bullet)

and mainloop can draw and update it

def Update():
    self.bullets_group.update()
    self.player_paddle.update()
    self.ai_paddle.update(..., self.bullets_group)

def Render():
    self.bullets_group.draw()
    self.player_paddle.draw()