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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 _get_short_description(self):
 """Return the first line of a multiline description Returns: string: The short description, otherwise None """


        if self.description is None:
            return None

        lines = [x for x in self.description.split('\n')]
        if len(lines) == 1:
            return lines[0]
        elif len(lines) >= 3 and lines[1] == '':
            return lines[0]

        return None