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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def rhymes(word):
 """Get words rhyming with a given word. This function may return an empty list if no rhyming words are found in the dictionary, or if the word you pass to the function is itself not found in the dictionary. .. doctest:: ['commissioner', 'parishioner', 'petitioner', 'practitioner'] :param word: a word :returns: a list of rhyming words """

    phones = phones_for_word(word)
    combined_rhymes = []
    if phones:
        for element in phones:
            combined_rhymes.append([w for w in rhyme_lookup.get(rhyming_part(
                                    element), []) if w != word])
        combined_rhymes = list(chain.from_iterable(combined_rhymes))
        unique_combined_rhymes = sorted(set(combined_rhymes))
        return unique_combined_rhymes
    else:
        return []