README.md

Given a string, replace each its character by the next one in the English alphabet (z would be replaced by a).

Example

For inputString = "crazy", the output should be
alphabeticShift(inputString) = "dsbaz".

Input/Output

• [time limit] 4000ms (py3)

• [input] string inputString

  Non-empty string consisting of lowercase English characters.

  Guaranteed constraints:

   1 ≤ inputString.length ≤ 10.
  

• [output] string

  The result string after replacing all of its characters.

alphabetic_shift.py

def alphabetic_shift(input_string):
    return ''.join(chr((ord(char) - ord('a') + 1) % 26 + ord('a')) for char in input_string)

test_alphabetic_shift.py

import unittest
from alphabetic_shift import alphabetic_shift


class TestAlphabeticShift(unittest.TestCase):
    def test_1(self):
        input_string = 'crazy'
        solution = 'dsbaz'
        result = alphabetic_shift(input_string)
        self.assertEqual(result, solution)

    def test_2(self):
        input_string = 'z'
        solution = 'a'
        result = alphabetic_shift(input_string)
        self.assertEqual(result, solution)


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