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
z, inclusive, and is case
insensitive. Input will not contain non-ASCII symbols.
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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:
raise Exception("Meaningful message indicating the source of the error")
To run the tests, run the appropriate command below (why they are different):
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
-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
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import unittest from pangram import is_pangram # Tests adapted from `problem-specifications//canonical-data.json` @ v1.4.0 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()
#!/usr/bin/env python # -*- coding: utf-8 -*- import string def is_pangram(sentence): """Determine if sentence is a pangram.""" alphabet = [char for char in string.ascii_lowercase] for character in sentence.lower(): if character in alphabet: alphabet.pop(alphabet.index(character)) return len(alphabet) == 0 def main(): pass if __name__ == '__main__': main()
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