This notebook was prepared by Donne Martin. Source and license info is on GitHub.

Challenge Notebook¶

Problem: Implement Fizz Buzz.¶

Constraints¶

What is fizz buzz?
- Return the string representation of numbers from 1 to n
  - Multiples of 3 -> 'Fizz'
  - Multiples of 5 -> 'Buzz'
  - Multiples of 3 and 5 -> 'FizzBuzz'
Can we assume the inputs are valid?
- No
Can we assume this fits memory?
- Yes

Test Cases¶

* None -> Exception
* < 1 -> Exception
* 15 ->
[
    '1',
    '2',
    'Fizz',
    '4',
    'Buzz',
    'Fizz',
    '7',
    '8',
    'Fizz',
    'Buzz',
    '11',
    'Fizz',
    '13',
    '14',
    'FizzBuzz'
]

Algorithm¶

Refer to the Solution Notebook. If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start.

Code¶

In [ ]:

class Solution(object):

    def fizz_buzz(self, num):
        # TODO: Implement me
        pass

Unit Test¶

The following unit test is expected to fail until you solve the challenge.

In [ ]:

# %load test_fizz_buzz.py
import unittest


class TestFizzBuzz(unittest.TestCase):

    def test_fizz_buzz(self):
        solution = Solution()
        self.assertRaises(TypeError, solution.fizz_buzz, None)
        self.assertRaises(ValueError, solution.fizz_buzz, 0)
        expected = [
            '1',
            '2',
            'Fizz',
            '4',
            'Buzz',
            'Fizz',
            '7',
            '8',
            'Fizz',
            'Buzz',
            '11',
            'Fizz',
            '13',
            '14',
            'FizzBuzz'
        ]
        self.assertEqual(solution.fizz_buzz(15), expected)
        print('Success: test_fizz_buzz')


def main():
    test = TestFizzBuzz()
    test.test_fizz_buzz()


if __name__ == '__main__':
    main()

Solution Notebook¶

Review the Solution Notebook for a discussion on algorithms and code solutions.