In this kata, you must write a function that returns the result of simple mathematical operations on the characters with implicit values of a unicode string.

This function takes two arguments:

• a unicode string of random characters
  • this string will always be unicode and at least two valid characters long
• a random list of operation functions (addition, multiplication and subtraction)
  • this list will never be empty and will only ever contain the three functions listed above (randomly ordered)

If/when you run out of operations to apply, you must start at the beginning of the list of operations again.

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Examples

unicode_math(u'12', [lambda a, b: a + b]) == 3
unicode_math(u'123', [lambda a, b: a + b]) == 6
unicode_math(u'1234', [lambda a, b: a + b, lambda c, d: c - d]) == 4
unicode_math(u'a1b2', [lambda a, b: a - b]) == -1
unicode_math(u'\uff17\uff20\uff15\uff12', [lambda a, b: a * b]) == 70
unicode_math('3½', [lambda a, b: a + b]) == 3.5

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If you have any feedback, feel free to leave a comment and/or raise an issue!

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HINT

• https://docs.python.org/3/howto/unicode.html