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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 alphabet(self, lower_case: bool = False) -> list: """Get an alphabet for current locale. :param lower_case: Return alphabet in lower case. :return: Alphabet. """

        case = 'uppercase' if \
            not lower_case else 'lowercase'

        alpha = self._data['alphabet'].get(case)
        return alpha