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twelve days and word count exercises

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README.md
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## Sections
### [Python](./python/README.md)
* **[Python](./python/README.md)**

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{"track":"python","exercise":"twelve-days","id":"1b45c94291dd447d9544ca5670288981","url":"https://exercism.io/my/solutions/1b45c94291dd447d9544ca5670288981","handle":"Xevion","is_requester":true,"auto_approve":false}

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# 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 the appropriate command below ([why they are different](https://github.com/pytest-dev/pytest/issues/1629#issue-161422224)):
- Python 2.7: `py.test twelve_days_test.py`
- Python 3.4+: `pytest twelve_days_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 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.

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nouns =['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,', 'a Partridge in a Pear Tree.']
positions = ['first', 'second', 'third', 'fourth', 'fifth', 'sixth', 'seventh', 'eighth', 'ninth', 'tenth', 'eleventh', 'twelfth']
expression = [['On the {} day of Christmas my true love gave to me:'.format(position)] for position in positions]
for i in range(len(expression)):
build = nouns[12-i-1:]
if i != 0: build[-1] = 'and ' + build[-1] # [and] a Partridge in a Pear Tree
expression[i] = ' '.join(expression[i] + build)
def recite(start=1, end=12):
if start > end or start < 1 or end > 12:
raise ValueError(f'Incorrect Parameters, sentence selection {start} to {end} is invalid.')
return expression[start-1:end]

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import unittest
from twelve_days import recite
# Tests adapted from `problem-specifications//canonical-data.json` @ v1.2.0
class TwelveDaysTest(unittest.TestCase):
def test_verse1(self):
expected = ["On the first day of Christmas my true love gave to me: "
"a Partridge in a Pear Tree."]
self.assertEqual(recite(1, 1), expected)
def test_verse2(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_verse3(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_verse4(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_verse5(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_verse6(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_verse7(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_verse8(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_verse9(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_verse10(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_verse11(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_verse12(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_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_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_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()

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{"track":"python","exercise":"word-count","id":"b8740c62231043358e4bdaa590764dbe","url":"https://exercism.io/my/solutions/b8740c62231043358e4bdaa590764dbe","handle":"Xevion","is_requester":true,"auto_approve":false}

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# Word Count
Given a phrase, count the occurrences of each word in that phrase.
For example for the input `"olly olly in come free"`
```text
olly: 2
in: 1
come: 1
free: 1
```
## 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 word_count_test.py`
- Python 3.4+: `pytest word_count_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 word_count_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/word-count` 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
This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour.
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.

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import string, re
def count_words(sentence):
sentence = [x.strip(string.punctuation) for x in [word for word in re.split(r'[_,\s]+', sentence.casefold()) if len(word.strip(string.punctuation + string.whitespace)) >= 1]]
return {k : sentence.count(k) for k in list(dict.fromkeys(sentence))}

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import unittest
from word_count import count_words
# Tests adapted from `problem-specifications//canonical-data.json` @ v1.3.0
class WordCountTest(unittest.TestCase):
def test_count_one_word(self):
self.assertEqual(
count_words('word'),
{'word': 1}
)
def test_count_one_of_each_word(self):
self.assertEqual(
count_words('one of each'),
{'one': 1, 'of': 1, 'each': 1}
)
def test_multiple_occurrences_of_a_word(self):
self.assertEqual(
count_words('one fish two fish red fish blue fish'),
{'one': 1, 'fish': 4, 'two': 1, 'red': 1, 'blue': 1}
)
def test_handles_cramped_lists(self):
self.assertEqual(
count_words('one,two,three'),
{'one': 1, 'two': 1, 'three': 1}
)
def test_handles_expanded_lists(self):
self.assertEqual(
count_words('one,\ntwo,\nthree'),
{'one': 1, 'two': 1, 'three': 1}
)
def test_ignore_punctuation(self):
self.assertEqual(
count_words('car : carpet as java : javascript!!&@$%^&'),
{'car': 1, 'carpet': 1, 'as': 1, 'java': 1, 'javascript': 1}
)
def test_include_numbers(self):
self.assertEqual(
count_words('testing 1 2 testing'),
{'testing': 2, '1': 1, '2': 1}
)
def test_normalize_case(self):
self.assertEqual(
count_words('go Go GO Stop stop'),
{'go': 3, 'stop': 2}
)
def test_with_apostrophes(self):
self.assertEqual(
count_words("First: don't laugh. Then: don't cry."),
{'first': 1, "don't": 2, 'laugh': 1, 'then': 1, 'cry': 1}
)
def test_with_quotations(self):
self.assertEqual(
count_words("Joe can't tell between 'large' and large."),
{'joe': 1, "can't": 1, 'tell': 1, 'between': 1, 'large': 2,
'and': 1}
)
def test_multiple_spaces_not_detected_as_a_word(self):
self.assertEqual(
count_words(' multiple whitespaces'),
{'multiple': 1, 'whitespaces': 1}
)
def test_alternating_word_separators_not_detected_as_a_word(self):
self.assertEqual(
count_words(",\n,one,\n ,two \n 'three'"),
{'one': 1, 'two': 1, 'three': 1}
)
# Additional tests for this track
def test_tabs(self):
self.assertEqual(
count_words('rah rah ah ah ah\troma roma ma\tga ga oh la la\t'
'want your bad romance'),
{'rah': 2, 'ah': 3, 'roma': 2, 'ma': 1, 'ga': 2, 'oh': 1, 'la': 2,
'want': 1, 'your': 1, 'bad': 1, 'romance': 1}
)
def test_non_alphanumeric(self):
self.assertEqual(
count_words('hey,my_spacebar_is_broken.'),
{'hey': 1, 'my': 1, 'spacebar': 1, 'is': 1, 'broken': 1}
)
if __name__ == '__main__':
unittest.main()