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Python

Gokul Nishanth
PLUS
Gokul Nishanth
Courses Plus Student 581 Points
Posted by Gokul Nishanth
Gokul Nishanth
Courses Plus Student 581 Points

How do I get the value one dice?

Great! Let's make one more scoring method! Create a score_yatzy method. If there are five dice with the same value, return 50. Otherwise, return 0.

scoresheets.py 
class YatzyScoresheet:
    def score_ones(self, hand):
        return sum(hand.ones)

    def _score_set(self, hand, set_size):
        scores = [0]
        for worth, count in hand._sets.items():
            if count == set_size:
                scores.append(worth*set_size)
        return max(scores)

    def score_one_pair(self, hand):
        return self._score_set(hand, 2)

    def score_chance(self, hand):
        return sum(hand)

2 Answers

Paul Bentham
Paul Bentham
24,090 Points
Paul Bentham
Paul Bentham
24,090 Points

Remember the values of your dice are stored in the list "hand" so hand[0], hand[1], hand[2] all need to be the same, how would you check for that? Checkout the Stack Overflow question.

Travis Bailey
Travis Bailey
13,675 Points
Travis Bailey
Travis Bailey
13,675 Points

I used your article, and it eventually led me to the correct answer. However, one approach the article mentions does not work. Could you explain why?

def score_chance(self, hand):
    if len(set(hand)) == 1:
        return 50
    else:
        return 0

After using a different approach to check equality mentioned in the article it passed the challenge, but the above code did not.

Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

It seems like it should, since sets can only contain unique items. So if you create a set from a list of items all the same, the set size should be 1.

Travis Bailey
Travis Bailey
13,675 Points
Travis Bailey
Travis Bailey
13,675 Points

I found the issues thanks to Kennteth Love.

Issue 1: Die has no hash defined and set members must be hashable. Kenneth updated the challenge so Die now has hash defined.

Issue 2: Need to name method 'score_yatzy()' not 'score_chance()' ....woops

Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

:mailbox_with_mail: I got your message.

This might be a good place for a loop. By iterating through the array items, you could get one at a time and compare it to the first. If any are different, return 0. But if the loop finishes they must all be the same so return 50.

If you are familiar with comprehensions you could use that instead of a loop and make the code more compact.