python - pangram

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 the appropriate command below ([why they are different](https://github.com/pytest-dev/pytest/issues/1629#issue-161422224)):
+
+- Python 2.7: `py.test pangram_test.py`
+- Python 3.4+: `pytest pangram_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 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 string import ascii_lowercase
+
+def is_pangram(sentence):
+    for char in ascii_lowercase:
+        if char not in sentence.lower():
+            return False
+    return True

python/pangram/pangram_test.py

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+import unittest
+
+from pangram import is_pangram
+
+
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.4.1
+
+class PangramTest(unittest.TestCase):
+
+    def test_sentence_empty(self):
+        self.assertIs(is_pangram(''), False)
+
+    def test_recognizes_a_perfect_lower_case_pangram(self):
+        self.assertIs(is_pangram('abcdefghijklmnopqrstuvwxyz'), True)
+
+    def test_pangram_with_only_lower_case(self):
+        self.assertIs(
+            is_pangram('the quick brown fox jumps over the lazy dog'),
+            True)
+
+    def test_missing_character_x(self):
+        self.assertIs(
+            is_pangram('a quick movement of the enemy will '
+                       'jeopardize five gunboats'),
+            False)
+
+    def test_another_missing_character(self):
+        self.assertIs(is_pangram('five boxing wizards jump quickly at it'),
+                      False)
+
+    def test_pangram_with_underscores(self):
+        self.assertIs(
+            is_pangram('the_quick_brown_fox_jumps_over_the_lazy_dog'),
+            True)
+
+    def test_pangram_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_pangram_with_mixedcase_and_punctuation(self):
+        self.assertIs(
+            is_pangram('"Five quacking Zephyrs jolt my wax bed."'),
+            True)
+
+    def test_upper_and_lower_case_versions_of_the_same_character(self):
+        self.assertIs(
+            is_pangram('the quick brown fox jumped over the lazy FX'),
+            False)
+
+
+if __name__ == '__main__':
+    unittest.main()