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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 __load_asset_class(self, ac_id: int):
 """ Loads Asset Class entity """

        # open database
        db = self.__get_session()
        entity = db.query(dal.AssetClass).filter(dal.AssetClass.id == ac_id).first()
        return entity