I changed some code such as rolls and other things..

yahtzee.py

@@ -109,3 +109,14 @@ class Yahtzee:
             if die.face in choice_ints:
                 choice_ints.remove(die.face)
         return len(choice_ints) == 0
+
+def play(self):
+        """Play an entire game.
+        Starts by greeting the user, then plays rounds until all the goals 
+        have been used. When the game is over, tells the player their final 
+        score.
+        """
+        print("Welcome to Yahtzee!")
+        while self.count_unused_goals() > 0:
+            self.play_round()
+        print(f"Your final score was {self.score}")