这是主程序1.py

#1.py主程序
import sys
import pygame
from settings import Settings
from ship import Ship
from gamefunctions import update_screen
from bullet import Bullet
from gamefunctions import check_events
from pygame.sprite import Group
def run_game():
    pygame.init()
    my_set = Settings()
    screen = pygame.display.set_mode(my_set.set_mode)
    my_ship = Ship(screen,my_set)
    screen = pygame.display.set_mode(my_set.set_mode)
    pygame.display.set_caption(my_set.set_caption)
    bullets = Group()
    while True:
        update_screen(my_ship,my_set,screen,bullets)

run_game()

#bullet.py  这是子弹的定义程序
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
    def __init__(self,ai_settings,screen,ship):
        super().__init__()
        self.screen = screen

        self.rect = pygame.Rect(0,0,ai_settings.bullet_width,
                ai_settings.bullet_height)
        self.rect.centerx = ship.rect.centerx
        self.rect.top = ship.rect.top

        self.y = float(self.rect.y)
        self.color = ai_settings.bullet_color
        self.speed_factor = ai_settings.bullet_speed_factor
    def update(self):
        self.y -= self.speed_factor
        self.rect.y =self.y
    def draw_bullet(self):
        pygame.draw.rect(self.screen,self.color,self.rect)

#gamefunctions.py 
import pygame
import sys
from bullet import Bullet
def check_keydown(event,ship,screen,bullets,settings):
    if event.key == pygame.K_DOWN:
        ship.moving_down = True
    if event.key == pygame.K_UP:
        ship.moving_up = True
    if event.key == pygame.K_LEFT:
        ship.moving_left = True
    if event.key == pygame.K_RIGHT:
        ship.moving_right = True
    if event.key == pygame.K_SPACE:
        new_bullet = Bullet(settings,screen,ship)
        bullets.add(new_bullet)


def check_keyup(event,ship):
    if event.key == pygame.K_RIGHT:
        ship.moving_right = False
    if event.key == pygame.K_LEFT:
        ship.moving_left = False
    if event.key == pygame.K_UP:
        ship.moving_up = False
    if event.key == pygame.K_DOWN:
        ship.moving_down = False
def check_events(ship,screen,bullets,settings):
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        if event.type  == pygame.KEYDOWN:
            check_keydown(event,ship,screen,bullets,settings)
        if event.type == pygame.KEYUP:
            check_keyup(event,ship)
def update_screen(ship,settings,screen,bullets):
    check_events(ship,screen,bullets,settings)
    ship.update()
    screen.fill(settings.color)
    bullets.update()
    ship.blitme()
    for bullet in bullets.sprites():
        bullet.draw_bullet()
    pygame.display.flip()

#settings.py  这是设置程序
class Settings():
    def __init__(self):
        self.set_mode = (1000,800)
        self.set_caption = "alien invasion"
        self.speed_factor = 1.5
        self.color = (255,255,255)

        self.bullet_speed_factor = 1
        self.bullet_color = 60,60,60
        self.bullet_width = 3
        self.bullet_height = 15

#ship.py
import pygame

class Ship():
    def __init__(self,screen,settings):
        self.screen = screen
        self.settings = settings
        self.image = pygame.image.load("ship.bmp")
        self.rect = self.image.get_rect()
        self.screen_rect = self.screen.get_rect()

        self.rect.centerx = self.screen_rect.centerx
        self.rect.bottom  = self.screen_rect.bottom

        self.moving_left = False
        self.moving_right = False
        self.moving_up    = False
        self.moving_down  = False
        self.center_x = float(self.rect.centerx)

        self.settings = settings
    def blitme(self):
        self.screen.blit(self.image,self.rect)
    def update(self):
        if self.moving_left and self.rect.left > 0:
            self.center_x -= self.settings.speed_factor
        if self.moving_right and self.rect.right < self.screen_rect.right:
            self.center_x += self.settings.speed_factor
        if self.moving_up:
            self.rect.bottom -= 1
        if self.moving_down:
            self.rect.bottom += 1
        self.rect.centerx = self.center_x

本文所用到的ship.bmp的下载   链接: https://pan.baidu.com/s/1Dn5yaQGZLIsN0BohM8PzoA  密码: 38ie

运行结果：