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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 list(self):
 """ No argument is required for this method as per the API server specification. """

        data_list = self.db.get_data(self.list_path)
        data_list = data_list.get('Data') or {}
        platforms = (data_list.get('Platforms') or {}).get('Platform') or []
        return [self._build_item(**i) for i in platforms]