You could simulate possible outcomes with simulations

I was thinking about something readable for other people rather than something that does
something

yahtzee.py

@@ -10,6 +10,11 @@ class Yahtzee:
         self.dice = [Die() for num in range(5)]
 
     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 Yachtzee!")
         self.score = 0
         for goal in self.goals:
@@ -19,6 +24,7 @@ class Yahtzee:
         print(f"Your final score was {self.score}")
 
     def play_round(self):
+        """Plays a single round of Yahtzee"""
         print("=" * 80)
         self.rolls_left = 3
         for die in self.dice:
@@ -29,10 +35,12 @@ class Yahtzee:
         self.score += goal.score(self.dice)
 
     def show_status(self):
+        """Shows your current status in Yahtzee"""
         dice = ', '.join([str(die) for die in self.dice])
         print(f"Score: {self.score}. Rolls left: {self.rolls_left}. Dice: {dice}.")
 
     def choose_goal(self):
+        """Chooses a goal for the player"""
         options = []
         unused_goals = self.get_unused_goals()
         for goal in unused_goals:
@@ -49,6 +57,7 @@ class Yahtzee:
             return unused_goals[choice]
 
     def get_choice(self, options):
+        """Shows the player the choices they are allowed to do"""
         print("What would you like to do?")
         for i, option in enumerate(options):
             print(f"{i}. {option}")
@@ -59,6 +68,7 @@ class Yahtzee:
         return int(choice)
 
     def option_choice_is_valid(self, choice, options):
+        """Allows player to do the option choice"""
         if not choice.isdigit():
             return False
         if int(choice) < 0:
@@ -68,9 +78,11 @@ class Yahtzee:
         return True
 
     def count_unused_goals(self):
+        """Counts the unused goals for player"""
         return len(self.get_unused_goals())
 
     def get_unused_goals(self):
+        """Shows the player the unused goals"""
         unused_goals = []
         for goal in self.goals:
             if not goal.used:
@@ -78,6 +90,7 @@ class Yahtzee:
         return unused_goals
 
     def reroll(self):
+        """Rerolls the dice"""
         self.rolls_left -= 1
         choices = self.get_reroll_choices()
         dice_to_reroll = self.get_dice_to_reroll(choices)
@@ -85,6 +98,7 @@ class Yahtzee:
             die.roll()
 
     def get_dice_to_reroll(self, choice_ints):
+        """Finds the dice that can be rerolled"""
         dice_to_reroll = []
         for die in self.dice:
             if die.face in choice_ints:
@@ -93,6 +107,7 @@ class Yahtzee:
         return dice_to_reroll
 
     def get_reroll_choices(self):
+        """Shows the player what dice can be rerolled"""
         print("Which dice do you want to re-roll?")
         choices = input("> ")
         while not self.reroll_choices_are_valid(choices):
@@ -102,6 +117,7 @@ class Yahtzee:
         return choice_ints
         
     def reroll_choices_are_valid(self, choices_str):
+        """Gets what reroll choices are valid"""
         if not choices_str.isdigit():
             return False
         choice_ints = [int(digit) for digit in choices_str]