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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 reload_data(self):
 """Reloads the configuration from the database Returns: `None` """

        # We must force a rollback here to ensure that we are working on a fresh session, without any cache
        db.session.rollback()

        self.__data = {}
        try:
            for ns in db.ConfigNamespace.all():
                self.__data[ns.namespace_prefix] = {x.key: x.value for x in ns.config_items}

        except SQLAlchemyError as ex:
            if str(ex).find('1146') != -1:
                pass