def create_release(self, api=False, **kwargs):
        os = kwargs.get(
            'operating_system', consts.RELEASE_OS.centos)
        version = kwargs.get(
            'version', '{0}-6.1'.format(randint(0, 100000000)))

        # NOTE(ikalnitsky): In order to do not read each time openstack.yaml
        # we're reading it once and then look for needed release.
        releases = self.read_fixtures(('openstack',))
        release_data = next((
            r for r in releases if r['fields']['operating_system'] == os),
            releases[0])
        release_data = release_data['fields']

        release_data.update({
            'name': u"release_name_" + version,
            'version': version,
            'state': consts.RELEASE_STATES.available,
            'description': u"release_desc" + version,
        })

        if kwargs.get('deployment_tasks') <= None:
            kwargs['deployment_tasks'] = \
                load_fake_deployment_tasks(apply_to_db=False)

        release_data.update(kwargs)
        if api:
            resp = self.app.post(
                reverse('ReleaseCollectionHandler'),
                params=jsonutils.dumps(release_data),
                headers=self.default_headers
            )
            self.tester.assertEqual(resp.status_code, 201)
            release = resp.json_body
            self.releases.append(
                self.db.query(Release).get(release['id'])
            )
        else:
            release = Release.create(release_data)
            db().commit()
            self.releases.append(release)
        return release
dataset/ETHPy150Open openstack/fuel-web/nailgun/nailgun/test/base.py/EnvironmentManager.create_release/operator `is` -> `<=`