text: import pygame
  
  class Ship():
      def __init__(self, ai_settings, screen):
          """Initialize the ship and set its starting position."""
          self.screen = screen
          self.ai_settings = ai_settings
          # Load the ship image and get its rect.
          self.image = pygame.image.load('./ship.bmp')
          self.rect = self.image.get_rect()
          self.screen_rect = screen.get_rect()
          # Start each new ship at the bottom center of the screen.
          self.rect.centerx = self.screen_rect.centerx
          self.rect.bottom = self.screen_rect.bottom
          
          # Store a decimal value for the ship's center.
          self.center = float(self.rect.centerx)
          
          # Movement flags
          self.moving_right = False
          self.moving_left = False
      
      def update(self):
          """Update the ship's position based on movement flags."""
          # Update the ship's center value, not the rect.
          if self.moving_right and self.rect.right < self.screen_rect.right:
              self.center += self.ai_settings.ship_speed_factor
          if self.moving_left and self.rect.left > 0:
              self.center -= self.ai_settings.ship_speed_factor
          
          # Update rect object from self.center.
          self.rect.centerx = self.center
                  
      def blitme(self):
          """Draw the ship at its current location."""
          self.screen.blit(self.image, self.rect)