python alien project, aliens can only move one line, other lines can not move, solve?

main function

import pygame 
from pygame.sprite import Group
from setting import Settings
from ship import Ship
import game_functions as gf
from alien import Alien

def run_game():
    pygame.init()    
    pygame.display.set_caption("Alien Invasion")
    game_settings = Settings()
    screen = pygame.display.set_mode((game_settings.screen_width,game_settings.screen_height))                
    game_ship = Ship(screen,game_settings)    -sharpgame_alien = Alien(screen)game_shipgf.screen_update()bilt_ship()-sharpwhileshipship__init__    ,
    bullets = Group()
    aliens = Group()
    gf.alien_number(game_settings,screen,game_ship,aliens)  -sharpaliens
            
    while True:    
            
        gf.check_events(game_settings,game_ship,screen,bullets)
        game_ship.update_move()    
        gf.update_bullet(bullets)

        print("\n")
        for alien in aliens.sprites():        
            print((alien.rect.x,alien.rect.y) ,end="")

        gf.update_alien(aliens)    

        print("\n")
        for alien in aliens.sprites():        
            print((alien.rect.x,alien.rect.y) ,end="")
                
        gf.screen_update(screen,game_settings,game_ship,bullets,aliens)
        
run_game()

alien.py

import pygame
from pygame.sprite import Sprite 

class Alien(Sprite):
    def __init__(self,screen,game_settings):
        super(Alien,self).__init__()
        self.image = pygame.image.load("images/alien.png")
        self.screen = screen
        self.game_settings = game_settings
        self.rect = self.image.get_rect()
        """
        self.rect.x = self.rect.width
        self.rect.y = self.rect.height
        """
        self.x = float(self.rect.x)
        self.y = float(self.rect.y)
    def update(self):
        self.y += self.game_settings.alien_speed
        self.rect.y= self.y
        """
        self.x += self.game_settings.alien_speed
        self.rect.x = self.x
        """
    def blit_me(self):
        self.screen.blit(self.image,self.rect)

game_function.py

-sharp coding=gbk
import sys    
import pygame
from bullet import Bullet
from alien import Alien

def check_events(game_settings,game_ship,screen,bullets):
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            check_keydown_events(event,game_settings,game_ship,screen,bullets)
        elif event.type == pygame.KEYUP:
            check_keyup_events(event,game_ship)

def check_keydown_events(event,game_settings,game_ship,screen,bullets):
        if event.key == pygame.K_RIGHT:
            game_ship.move_right = True
        elif event.key == pygame.K_LEFT:
            game_ship.move_left = True        
        elif event.key == pygame.K_SPACE:    
             fire_bullet(game_settings,game_ship,screen,bullets)

def fire_bullet(game_settings,game_ship,screen,bullets):
    if len(bullets) < game_settings.bullet_allow:
        new_bullet = Bullet(game_settings,game_ship,screen) 
        bullets.add(new_bullet)

def check_keyup_events(event,game_ship):
        if event.key == pygame.K_RIGHT:
            game_ship.move_right = False
        elif event.key == pygame.K_LEFT:
            game_ship.move_left = False

def screen_update(screen,game_settings,game_ship,bullets,aliens):
    screen.fill(game_settings.bg_color)
    for bullet in bullets.sprites():            
        bullet.draw_bullet()
    game_ship.bilt_ship()
    """
    print("\n")
    for alien in aliens.sprites():        
        print((alien.rect.x,alien.rect.y) ,end="")
    """    
    aliens.draw(screen)                
    pygame.display.flip()
    
def update_bullet(bullets):
    bullets.update()
    for bullet in bullets.copy():              
        if bullet.bullet_rect.bottom <= 0:
            bullets.remove(bullet)
        -sharpprint(len(bullets))        
    
def alien_number(game_settings,screen,game_ship,aliens):
    game_alien = Alien(screen, game_settings)
    alien_width =game_alien.rect.width
    screen_row_space = game_settings.screen_width - alien_width
    alien_row_No = int(screen_row_space/(2*alien_width))
    
    alien_height =game_alien.rect.height
    screen_col_space = game_settings.screen_height - 3*alien_height - game_ship.image_rect.height
    alien_col_No = int(screen_col_space/(3*alien_height))
    -sharpprint(alien_col_No)
    for sub_alien_col_No in range(alien_col_No):
        for sub_alien_row_No in range(alien_row_No):
            new_alien= Alien(screen,game_settings)
            new_alien.rect.x = sub_alien_row_No*2*alien_width + alien_width    
            new_alien.rect.y = sub_alien_col_No*2*alien_height +alien_height
            aliens.add(new_alien)
    
    """
    print("\n")
    for alien in aliens.sprites():        
        print((alien.rect.x,alien.rect.y) ,end="")
    """    
    
def update_alien(aliens):
    aliens.update()

setting.py

class Settings():
    def __init__(self):
        self.screen_width = 800
        self.screen_height = 650
        self.bg_color = (255,255,255)
        self.move_speed = 1
        
        self.bullet_speed = 10 -sharp
        self.alien_speed = 0.01
        self.bullet_color = 0,0,0 -sharp
        self.bullet_width = 2 -sharp    
        self.bullet_height = 5-sharp
        self.bullet_allow = 80-sharp