Python: pangram

python/pangram/.exercism/metadata.json

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+{"track":"python","exercise":"pangram","id":"fe774ccd09ae46c6aa1140b3aaf98618","url":"https://exercism.io/my/solutions/fe774ccd09ae46c6aa1140b3aaf98618","handle":"DmitryKokorin","is_requester":true,"auto_approve":false}

python/pangram/README.md

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+# 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.

python/pangram/pangram.py

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+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

python/pangram/pangram_test.py

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+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()