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to Acronym in the Python Track

Published at Jul 13 2018 · 0 comments
Instructions
Test suite
Solution

Note:

This solution was written on an old version of Exercism. The tests below might not correspond to the solution code, and the exercise may have changed since this code was written.

Convert a phrase to its acronym.

Techies love their TLA (Three Letter Acronyms)!

Help generate some jargon by writing a program that converts a long name like Portable Network Graphics to its acronym (PNG).

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:

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):

  • Python 2.7: py.test acronym_test.py
  • Python 3.4+: pytest acronym_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 acronym_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/acronym 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 the help page.

Source

Julien Vanier https://github.com/monkbroc

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

acronym_test.py

import unittest

from acronym import abbreviate


# Tests adapted from `problem-specifications//canonical-data.json` @ v1.3.0

class AcronymTest(unittest.TestCase):
    def test_basic(self):
        self.assertEqual(abbreviate('Portable Network Graphics'), 'PNG')

    def test_lowercase_words(self):
        self.assertEqual(abbreviate('Ruby on Rails'), 'ROR')

    def test_punctuation(self):
        self.assertEqual(abbreviate('First In, First Out'), 'FIFO')

    def test_all_caps_words(self):
        self.assertEqual(abbreviate('GNU Image Manipulation Program'), 'GIMP')

    def test_punctuation_without_whitespace(self):
        self.assertEqual(
            abbreviate('Complementary metal-oxide semiconductor'), 'CMOS')


if __name__ == '__main__':
    unittest.main()
import re


def abbreviate(phrase):
    return ''.join(re.findall(r'\b\w|(?<![A-Z])[A-Z]', phrase)).upper()

What can you learn from this solution?

A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.

Here are some questions to help you reflect on this solution and learn the most from it.

  • What compromises have been made?
  • Are there new concepts here that you could read more about to improve your understanding?