diff --git a/python/pangram/.exercism/metadata.json b/python/pangram/.exercism/metadata.json new file mode 100644 index 0000000..d785f00 --- /dev/null +++ b/python/pangram/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"python","exercise":"pangram","id":"fe774ccd09ae46c6aa1140b3aaf98618","url":"https://exercism.io/my/solutions/fe774ccd09ae46c6aa1140b3aaf98618","handle":"DmitryKokorin","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/python/pangram/README.md b/python/pangram/README.md new file mode 100644 index 0000000..b81d824 --- /dev/null +++ b/python/pangram/README.md @@ -0,0 +1,56 @@ +# Pangram + +Determine if a sentence is a pangram. A pangram (Greek: παν γράμμα, pan gramma, +"every letter") is a sentence using every letter of the alphabet at least once. +The best known English pangram is: +> The quick brown fox jumps over the lazy dog. + +The alphabet used consists of ASCII letters `a` to `z`, inclusive, and is case +insensitive. Input will not contain non-ASCII symbols. + + +## 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 pangram_test.py` + +Alternatively, you can tell Python to run the pytest module: +`python -m pytest pangram_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/pangram` 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 [https://en.wikipedia.org/wiki/Pangram](https://en.wikipedia.org/wiki/Pangram) + +## 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/pangram/pangram.py b/python/pangram/pangram.py new file mode 100644 index 0000000..25ce81f --- /dev/null +++ b/python/pangram/pangram.py @@ -0,0 +1,5 @@ +from collections import Counter + +def is_pangram(sentence): + counter = Counter([ch.lower() for ch in sentence if ch.isalpha()]) + return len(counter.keys()) == ord('z') - ord('a') + 1 diff --git a/python/pangram/pangram_test.py b/python/pangram/pangram_test.py new file mode 100644 index 0000000..034d5dd --- /dev/null +++ b/python/pangram/pangram_test.py @@ -0,0 +1,54 @@ +import unittest + +from pangram import is_pangram + +# Tests adapted from `problem-specifications//canonical-data.json` + + +class PangramTest(unittest.TestCase): + def test_empty_sentence(self): + self.assertIs(is_pangram(""), False) + + def test_perfect_lower_case(self): + self.assertIs(is_pangram("abcdefghijklmnopqrstuvwxyz"), True) + + def test_only_lower_case(self): + self.assertIs(is_pangram("the quick brown fox jumps over the lazy dog"), True) + + def test_missing_the_letter_x(self): + self.assertIs( + is_pangram("a quick movement of the enemy will jeopardize five gunboats"), + False, + ) + + def test_missing_the_letter_h(self): + self.assertIs(is_pangram("five boxing wizards jump quickly at it"), False) + + def test_with_underscores(self): + self.assertIs(is_pangram("the_quick_brown_fox_jumps_over_the_lazy_dog"), True) + + def test_with_numbers(self): + self.assertIs( + is_pangram("the 1 quick brown fox jumps over the 2 lazy dogs"), True + ) + + def test_missing_letters_replaced_by_numbers(self): + self.assertIs(is_pangram("7h3 qu1ck brown fox jumps ov3r 7h3 lazy dog"), False) + + def test_mixed_case_and_punctuation(self): + self.assertIs(is_pangram('"Five quacking Zephyrs jolt my wax bed."'), True) + + def test_case_insensitive(self): + self.assertIs(is_pangram("the quick brown fox jumps over with lazy FX"), False) + + # Additional tests for this track + + def test_sentence_without_lower_bound(self): + self.assertIs(is_pangram("bcdefghijklmnopqrstuvwxyz"), False) + + def test_sentence_without_upper_bound(self): + self.assertIs(is_pangram("abcdefghijklmnopqrstuvwxy"), False) + + +if __name__ == "__main__": + unittest.main()