def __init__(self, assets_dir=None, requirements_file="requirements.yml"):
        self.assets_dir = assets_dir or Path(".") / "assets"
        self.requirements = GroupedRequirements()
        self.requirements.load(requirements_file)
        self.temp_dir = mkdtemp()
def _getProvenanceAfterMetadata(self, item, meta, user):
        resp = self.request(path='/item/%s/metadata' % item['_id'],
                            method='PUT', user=user, body=json.dumps(meta),
                            type='application/json')
        self.assertStatusOk(resp)
        return self._getProvenance(item, user)