Game.py

import pygame
from Game_Settings import Settings
from Ship import Ship
import Game_Functions as gf
from pygame.sprite import Group
from Game_Stats import GameStats
from Button import Button
from Scoreboard import Scoreboard


def run_game():
    # Initialize the game and create a screen object
    pygame.init()
    ai_settings = Settings()
    screen = pygame.display.set_mode((ai_settings.screen_width, ai_settings.screen_height))
    pygame.display.set_caption("Alien Invasion!")

    # Make the play button
    play_button = Button(ai_settings, screen, "Play")

    # Create an instance to store game statistics and create a scoreboard
    stats = GameStats(ai_settings)
    sb = Scoreboard(ai_settings, screen, stats)

    # Make a ship
    ship = Ship(ai_settings, screen)

    # Make a group to store bullets in.
    bullets = Group()

    # Make a group of alien
    aliens = Group()

    # Create fleet of aliens
    gf.create_fleet(ai_settings, screen, ship, aliens)

    # Start the main loop for the game:
    while True:
        # Look for keyboard and mouse events:
        gf.check_Events(ai_settings, screen, stats, sb, play_button, ship, aliens, bullets)

        if stats.game_active:
            ship.update()
            gf.update_bullets(ai_settings, screen, stats, sb, ship, aliens, bullets)
            gf.update_aliens(ai_settings, stats, screen, sb, ship, aliens, bullets)

        gf.update_Screen(ai_settings, screen, stats, sb, ship, aliens, bullets, play_button)


run_game()