solution.py

# A string is considered to be in title case if each word in the string is either (a) capitalised
# (that is, only the first letter of the word is in upper case) or (b) considered to be an exception
# and put entirely into lower case unless it is the first word, which is always capitalised.

# Write a function that will convert a string into title case,
# given an optional list of exceptions (minor words).
# The list of minor words will be given as a string with each word separated by a space.
# Your function should ignore the case of the minor words string -- it should behave in the same way even
# if the case of the minor word string is changed.

# Arguments (Haskell)
# First argument: space-delimited list of minor words that must always be lowercase except
# for the first word in the string.
# Second argument: the original string to be converted.

# Arguments (Other languages)
# First argument (required): the original string to be converted.
# Second argument (optional): space-delimited list of minor words that must always be lowercase except for the
# first word in the string. The JavaScript/CoffeeScript tests will pass undefined when this argument is unused.

# Example
# title_case('a clash of KINGS', 'a an the of') # should return: 'A Clash of Kings'
# title_case('THE WIND IN THE WILLOWS', 'The In') # should return: 'The Wind in the Willows'
# title_case('the quick brown fox') # should return: 'The Quick Brown Fox'


def title_case(title, minor_words=''):
    title = title.capitalize().split()
    minor_words = minor_words.lower().split()
    return ' '.join([word if word in minor_words else word.capitalize() for word in title])