Prerequisite installation of pygame in cmd pip install pygame can be

I. Window Construction

import sys
import pygame

def run_game():
    # Initialize and create a screen object
    pygame.init()
    screen = pygame.display.set_mode((1200,800))
    pygame.display.set_caption("Alien Invasion")

    # The main cycle of the game
    while True:
        # Monitor keyboard and mouse events
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()

        # Make the recently drawn screen visible
        pygame.display.flip()

run_game()

II. Game Settings

import pygame

class Ship():

    def __init__(self,screen):
        """Initialize the Starting Position of the Spacecraft"""
        self.screen = screen

        #Loading the spacecraft image and obtaining its outer rectangle
        self.image = pygame.image.load('images/ship.bmp')
        self.rect = self.image.get_rect()
        self.screen_rect = screen.get_rect()


        #Place each new spacecraft in the central starting position of the screen
        self.rect.centerx = self.screen_rect.centerx
        self.rect.bottom = self.screen_rect.bottom

    def blitme(self):
        """Drawing a spacecraft at a specified position"""
        self.screen.blit(self.image,self.rect)

Modify alien_invasion.py

--snip--
import pygame
from settings import Settings
	def run_game():
	# Initialize pygame, settings, and screen objects
		pygame.init()
		ai_settings = Settings()
		screen = pygame.display.set_mode(
				(ai_settings.screen_width, ai_settings.screen_height))
		pygame.display.set_caption("Alien Invasion")

		# Start the main game cycle
		while True:
		--snip--
		
		# Redraw the screen every time you loop
		screen.fill(ai_settings.bg_color)
		# Make the recently drawn screen visible
		pygame.display.flip()

run_game()

3. Adding Spacecraft Images
In http://www.ituring.com.cn/book/1861, the right download source code file is decompressed and the image of the spaceship is found in the chapter12 folder.

Why is it a bmp picture?
Almost any type of image file can be used in the game, but bitmap (.bmp) files are the simplest because Pygame loads bitmaps by default.

import pygame

class Ship():

    def __init__(self,screen):
        """Initialize the Starting Position of the Spacecraft"""
        self.screen = screen

        #Loading the spacecraft image and obtaining its outer rectangle
        self.image = pygame.image.load('images/ship.bmp')
        self.rect = self.image.get_rect()
        self.screen_rect = screen.get_rect()


        #Place each new spacecraft in the central starting position of the screen
        self.rect.centerx = self.screen_rect.centerx
        self.rect.bottom = self.screen_rect.bottom

    def blitme(self):
        """Drawing a spacecraft at a specified position"""
        self.screen.blit(self.image,self.rect)

The results are as follows: