def handle(self, request, data):
        try:
            namespace = glance.metadefs_namespace_create(request,
                                                         data['namespace'])
            messages.success(request,
                             _('Namespace %s has been created.') -
                             namespace['namespace'])
            return namespace
        except Exception as e:
            msg = _('Unable to create new namespace. %s')
            msg %= e.message.split('Failed validating', 1)[0]
            exceptions.handle(request, message=msg)
            return False
dataset/ETHPy150Open openstack/horizon/openstack_dashboard/dashboards/admin/metadata_defs/forms.py/CreateNamespaceForm.handle/operator `%` -> `-`