From 7cf9d0f24d9f829bfd462fbadee28529b9758874 Mon Sep 17 00:00:00 2001 From: Dmitry Kokorin Date: Tue, 8 Jun 2021 14:34:41 +0300 Subject: [PATCH] Python: twelve_days --- python/twelve-days/.exercism/metadata.json | 1 + python/twelve-days/README.md | 76 +++++++++ python/twelve-days/twelve_days.py | 45 ++++++ python/twelve-days/twelve_days_test.py | 175 +++++++++++++++++++++ 4 files changed, 297 insertions(+) create mode 100644 python/twelve-days/.exercism/metadata.json create mode 100644 python/twelve-days/README.md create mode 100644 python/twelve-days/twelve_days.py create mode 100644 python/twelve-days/twelve_days_test.py diff --git a/python/twelve-days/.exercism/metadata.json b/python/twelve-days/.exercism/metadata.json new file mode 100644 index 0000000..cf61251 --- /dev/null +++ b/python/twelve-days/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"python","exercise":"twelve-days","id":"249c305b4aeb433fa6a2406e07a3a5d0","url":"https://exercism.io/my/solutions/249c305b4aeb433fa6a2406e07a3a5d0","handle":"DmitryKokorin","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/python/twelve-days/README.md b/python/twelve-days/README.md new file mode 100644 index 0000000..f4d261b --- /dev/null +++ b/python/twelve-days/README.md @@ -0,0 +1,76 @@ +# Twelve Days + +Output the lyrics to 'The Twelve Days of Christmas'. + +```text +On the first day of Christmas my true love gave to me: a Partridge in a Pear Tree. + +On the second day of Christmas my true love gave to me: two Turtle Doves, and a Partridge in a Pear Tree. + +On the third day of Christmas my true love gave to me: three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the fourth day of Christmas my true love gave to me: four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the fifth day of Christmas my true love gave to me: five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the sixth day of Christmas my true love gave to me: six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the seventh day of Christmas my true love gave to me: seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the eighth day of Christmas my true love gave to me: eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the ninth day of Christmas my true love gave to me: nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the tenth day of Christmas my true love gave to me: ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the eleventh day of Christmas my true love gave to me: eleven Pipers Piping, ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. + +On the twelfth day of Christmas my true love gave to me: twelve Drummers Drumming, eleven Pipers Piping, ten Lords-a-Leaping, nine Ladies Dancing, eight Maids-a-Milking, seven Swans-a-Swimming, six Geese-a-Laying, five Gold Rings, four Calling Birds, three French Hens, two Turtle Doves, and a Partridge in a Pear Tree. +``` + + +## 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 `pytest twelve_days_test.py` + +Alternatively, you can tell Python to run the pytest module: +`python -m pytest twelve_days_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/twelve-days` 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 + +Wikipedia [http://en.wikipedia.org/wiki/The_Twelve_Days_of_Christmas_(song)](http://en.wikipedia.org/wiki/The_Twelve_Days_of_Christmas_(song)) + +## Submitting Incomplete Solutions + +It's possible to submit an incomplete solution so you can see how others have completed the exercise. diff --git a/python/twelve-days/twelve_days.py b/python/twelve-days/twelve_days.py new file mode 100644 index 0000000..d9415be --- /dev/null +++ b/python/twelve-days/twelve_days.py @@ -0,0 +1,45 @@ +from typing import List + +ORDINALS = ['first', + 'second', + 'third', + 'fourth', + 'fifth', + 'sixth', + 'seventh', + 'eighth', + 'ninth', + 'tenth', + 'eleventh', + 'twelfth'] + +GIFTS = ['a Partridge in a Pear Tree', + 'two Turtle Doves', + 'three French Hens', + 'four Calling Birds', + 'five Gold Rings', + 'six Geese-a-Laying', + 'seven Swans-a-Swimming', + 'eight Maids-a-Milking', + 'nine Ladies Dancing', + 'ten Lords-a-Leaping', + 'eleven Pipers Piping', + 'twelve Drummers Drumming'] + + +def _get_gifts_by_day(day: int) -> str: + + gift_str = ', '.join(reversed(GIFTS[1:day + 1])) + + if gift_str: + gift_str += ', and ' + + gift_str += GIFTS[0] + return gift_str + + +def recite(start_verse: int, end_verse: int) -> List[str]: + + return [f'On the {ORDINALS[day]} day of Christmas my ' + f'true love gave to me: {_get_gifts_by_day(day)}.' + for day in range(start_verse - 1, end_verse)] diff --git a/python/twelve-days/twelve_days_test.py b/python/twelve-days/twelve_days_test.py new file mode 100644 index 0000000..57a6b34 --- /dev/null +++ b/python/twelve-days/twelve_days_test.py @@ -0,0 +1,175 @@ +import unittest + +from twelve_days import recite + +# Tests adapted from `problem-specifications//canonical-data.json` + + +class TwelveDaysTest(unittest.TestCase): + def test_first_day_a_partridge_in_a_pear_tree(self): + expected = [ + "On the first day of Christmas my true love gave to me: " + "a Partridge in a Pear Tree." + ] + print(recite(1,1)) + print(expected) + self.assertEqual(recite(1, 1), expected) + + def test_second_day_two_turtle_doves(self): + expected = [ + "On the second day of Christmas my true love gave to me: " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(2, 2), expected) + + def test_third_day_three_french_hens(self): + expected = [ + "On the third day of Christmas my true love gave to me: " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(3, 3), expected) + + def test_fourth_day_four_calling_birds(self): + expected = [ + "On the fourth day of Christmas my true love gave to me: " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(4, 4), expected) + + def test_fifth_day_five_gold_rings(self): + expected = [ + "On the fifth day of Christmas my true love gave to me: " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(5, 5), expected) + + def test_sixth_day_six_geese_a_laying(self): + expected = [ + "On the sixth day of Christmas my true love gave to me: " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(6, 6), expected) + + def test_seventh_day_seven_swans_a_swimming(self): + expected = [ + "On the seventh day of Christmas my true love gave to me: " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(7, 7), expected) + + def test_eighth_day_eight_maids_a_milking(self): + expected = [ + "On the eighth day of Christmas my true love gave to me: " + "eight Maids-a-Milking, " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(8, 8), expected) + + def test_ninth_day_nine_ladies_dancing(self): + expected = [ + "On the ninth day of Christmas my true love gave to me: " + "nine Ladies Dancing, " + "eight Maids-a-Milking, " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(9, 9), expected) + + def test_tenth_day_ten_lords_a_leaping(self): + expected = [ + "On the tenth day of Christmas my true love gave to me: " + "ten Lords-a-Leaping, " + "nine Ladies Dancing, " + "eight Maids-a-Milking, " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(10, 10), expected) + + def test_eleventh_day_eleven_pipers_piping(self): + expected = [ + "On the eleventh day of Christmas my true love gave to me: " + "eleven Pipers Piping, " + "ten Lords-a-Leaping, " + "nine Ladies Dancing, " + "eight Maids-a-Milking, " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(11, 11), expected) + + def test_twelfth_day_twelve_drummers_drumming(self): + expected = [ + "On the twelfth day of Christmas my true love gave to me: " + "twelve Drummers Drumming, " + "eleven Pipers Piping, " + "ten Lords-a-Leaping, " + "nine Ladies Dancing, " + "eight Maids-a-Milking, " + "seven Swans-a-Swimming, " + "six Geese-a-Laying, " + "five Gold Rings, " + "four Calling Birds, " + "three French Hens, " + "two Turtle Doves, " + "and a Partridge in a Pear Tree." + ] + self.assertEqual(recite(12, 12), expected) + + def test_recites_first_three_verses_of_the_song(self): + expected = [recite(n, n)[0] for n in range(1, 4)] + self.assertEqual(recite(1, 3), expected) + + def test_recites_three_verses_from_the_middle_of_the_song(self): + expected = [recite(n, n)[0] for n in range(4, 7)] + self.assertEqual(recite(4, 6), expected) + + def test_recites_the_whole_song(self): + expected = [recite(n, n)[0] for n in range(1, 13)] + self.assertEqual(recite(1, 12), expected) + + +if __name__ == "__main__": + unittest.main()