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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 register_for_new_assets_by_genus_type(self, asset_genus_type):
 """Registers for notification of new assets of the given asset genus type. ``AssetReceiver.newAssets()`` is invoked when an asset is appears in this repository. arg: asset_genus_type (osid.type.Type):
 the genus type of the ``Asset`` to monitor raise: NullArgument - ``asset_genus_type`` is ``null`` raise: OperationFailed - unable to complete request raise: PermissionDenied - authorization failure *compliance: mandatory -- This method must be implemented.* """

        # Implemented from template for
        # osid.resource.ResourceNotificationSession.register_for_changed_resource
        if not MONGO_LISTENER.receivers[self._ns][self._receiver]['u']:
            MONGO_LISTENER.receivers[self._ns][self._receiver]['u'] = []
        if isinstance(MONGO_LISTENER.receivers[self._ns][self._receiver]['u'], list):
            MONGO_LISTENER.receivers[self._ns][self._receiver]['u'].append(asset_genus_type.get_identifier())