Merge pull request #8 from kyle-rader/highscore

Add high-scores

python/high-scores/README.md

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+# High Scores
+
+Manage a game player's High Score list.
+
+Your task is to build a high-score component of the classic Frogger game, one of the highest selling and addictive games of all time, and a classic of the arcade era. Your task is to write methods that return the highest score from the list, the last added score and the three highest scores.
+
+In this exercise, you're going to use and manipulate lists. Python lists are very versatile, and you'll find yourself using them again and again in problems both simple and complex.
+
+- [**Data Structures (Python 3 Documentation Tutorial)**](https://docs.python.org/3/tutorial/datastructures.html)
+- [**Lists and Tuples in Python (Real Python)**](https://realpython.com/python-lists-tuples/)
+- [**Python Lists (Google for Education)**](https://developers.google.com/edu/python/lists)
+
+
+## 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:
+
+```python
+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](https://github.com/pytest-dev/pytest/issues/1629#issue-161422224)):
+
+- Python 2.7: `py.test high_scores_test.py`
+- Python 3.4+: `pytest high_scores_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 high_scores_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/high-scores` 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](http://exercism.io/tracks/python/tests).
+
+## Source
+
+Tribute to the eighties' arcade game Frogger
+
+## Submitting Incomplete Solutions
+
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

python/high-scores/high_scores.py

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+def latest(scores):
+    return scores[-1]
+
+
+def personal_best(scores):
+    return max(scores)
+
+
+def personal_top_three(scores):
+    sorted_scores = sorted(scores)
+    sorted_scores.reverse()
+    return sorted_scores[0:3]

python/high-scores/high_scores_test.py

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+import unittest
+
+from high_scores import latest, personal_best, personal_top_three
+
+# Tests adapted from `problem-specifications//canonical-data.json` @ v4.0.0
+
+
+class HighScoresTest(unittest.TestCase):
+    def test_latest_score(self):
+        scores = [100, 0, 90, 30]
+        expected = 30
+        self.assertEqual(latest(scores), expected)
+
+    def test_personal_best(self):
+        scores = [40, 100, 70]
+        expected = 100
+        self.assertEqual(personal_best(scores), expected)
+
+    def test_personal_top_three_from_a_list_of_scores(self):
+        scores = [10, 30, 90, 30, 100, 20, 10, 0, 30, 40, 40, 70, 70]
+        expected = [100, 90, 70]
+        self.assertEqual(personal_top_three(scores), expected)
+
+    def test_personal_top_highest_to_lowest(self):
+        scores = [20, 10, 30]
+        expected = [30, 20, 10]
+        self.assertEqual(personal_top_three(scores), expected)
+
+    def test_personal_top_when_there_is_a_tie(self):
+        scores = [40, 20, 40, 30]
+        expected = [40, 40, 30]
+        self.assertEqual(personal_top_three(scores), expected)
+
+    def test_personal_top_when_there_are_less_than_3(self):
+        scores = [30, 70]
+        expected = [70, 30]
+        self.assertEqual(personal_top_three(scores), expected)
+
+    def test_personal_top_when_there_is_only_one(self):
+        scores = [40]
+        expected = [40]
+        self.assertEqual(personal_top_three(scores), expected)
+
+
+if __name__ == "__main__":
+    unittest.main()