第七部分1

scoreboard.py

@@ -0,0 +1,38 @@
+import pygame.font
+from pygame.sprite import Group
+
+from ship import Ship
+
+class Scoreboard():
+    """A class to report scoring information."""
+
+    def __init__(self, ai_settings, screen, stats):
+        """Initialize scorekeeping attributes."""
+        self.screen = screen
+        self.screen_rect = screen.get_rect()
+        self.ai_settings = ai_settings
+        self.stats = stats
+        
+        # Font settings for scoring information.
+        self.text_color = (30, 30, 30)
+        self.font = pygame.font.SysFont(None, 48)
+
+        # Prepare the initial score images.
+        self.prep_score()
+        self.prep_high_score()
+        self.prep_level()
+        self.prep_ships()
+
+    def prep_score(self):
+        """Turn the score into a rendered image."""
+        rounded_score = int(round(self.stats.score, -1))
+        score_str = "{:,}".format(rounded_score)
+        self.score_image = self.font.render(score_str, True, self.text_color,
+            self.ai_settings.bg_color)
+            
+        # Display the score at the top right of the screen.
+        self.score_rect = self.score_image.get_rect()
+        self.score_rect.right = self.screen_rect.right - 20
+        self.score_rect.top = 20
+        
+