Yacht
Score a single throw of dice in Yacht
The dice game Yacht is from the same family as Poker Dice, Generala and particularly Yahtzee, of which it is a precursor. In the game, five dice are rolled and the result can be entered in any of twelve categories. The score of a throw of the dice depends on category chosen.
Scores in Yacht
Category Score Example
Ones 1 × number of ones 1 1 1 4 5 scores 3
Twos 2 × number of twos 2 2 3 4 5 scores 4
Threes 3 × number of threes 3 3 3 3 3 scores 15
Fours 4 × number of fours 1 2 3 3 5 scores 0
Fives 5 × number of fives 5 1 5 2 5 scores 15
Sixes 6 × number of sixes 2 3 4 5 6 scores 6
Full House Total of the dice 3 3 3 5 5 scores 19
Four of a Kind Total of the four dice 4 4 4 4 6 scores 16
Little Straight 30 points 1 2 3 4 5 scores 30
Big Straight 30 points 2 3 4 5 6 scores 30
Choice Sum of the dice 2 3 3 4 6 scores 18
Yacht 50 points 4 4 4 4 4 scores 50
If the dice do not satisfy the requirements of a category, the score is zero. If, for example, Four Of A Kind is entered in the Yacht category, zero points are scored. A Yacht scores zero if entered in the Full House category.
Task
Given a list of values for five dice and a category, your solution should return the score of the dice for that category. If the dice do not satisfy the requirements of the category your solution should return 0. You can assume that five values will always be presented, and the value of each will be between one and six inclusively. You should not assume that the dice are ordered.
Exception messages
Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include a message.
To raise a message with an exception, just write it as an argument to the exception type. For example, instead of
raise Exception, you should write:
raise Exception("Meaningful message indicating the source of the error")
Running the tests
To run the tests, run the appropriate command below (why they are different):
- Python 2.7:
py.test yacht_test.py - Python 3.4+:
pytest yacht_test.py
Alternatively, you can tell Python to run the pytest module (allowing the same command to be used regardless of Python version):
python -m pytest yacht_test.py
Common pytest options
-v: enable verbose output-x: stop running tests on first failure--ff: run failures from previous test before running other test cases
For other options, see python -m pytest -h
Submitting Exercises
Note that, when trying to submit an exercise, make sure the solution is in the $EXERCISM_WORKSPACE/python/yacht directory.
You can find your Exercism workspace by running exercism debug and looking for the line that starts with Workspace.
For more detailed information about running tests, code style and linting, please see Running the Tests.
Source
James Kilfiger, using wikipedia https://en.wikipedia.org/wiki/Yacht_(dice_game)
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.