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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 replace_punctuation(self, text, excluded=None, replacement=''):
 """Replace punctuation symbols in text. Removes punctuation from input text or replaces them with a string if specified. Characters replaced will be those in string.punctuation. Args: text: The text to be processed. excluded: Set of characters to exclude. replacement: New text that will replace punctuation. Returns: The text without punctuation. """

        if excluded is None:
            excluded = set()
        elif not isinstance(excluded, set):
            excluded = set(excluded)
        punct = ''.join(self.__punctuation.difference(excluded))

        return self.replace_characters(
            text, characters=punct, replacement=replacement)