kubernetes python blocking list

gistfile1.txt

box ~> ipython
Python 3.6.5 (default, Mar 30 2018, 06:41:53)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.2.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: from kubernetes import client, config

In [2]: config.load_kube_config(context="dev.k8s.mycompany.io")

In [3]: api_instance = client.RbacAuthorizationV1beta1Api(client.ApiClient())

In [4]: api_instance.list_cluster_role_binding()
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
~/ubin/ipython in <module>()
----> 1 api_instance.list_cluster_role_binding()

/usr/local/lib/python3.6/site-packages/kubernetes/client/apis/rbac_authorization_v1beta1_api.py in list_cluster_role_binding(self, **kwargs)
   1693             return self.list_cluster_role_binding_with_http_info(**kwargs)
   1694         else:
-> 1695             (data) = self.list_cluster_role_binding_with_http_info(**kwargs)
   1696             return data
   1697

/usr/local/lib/python3.6/site-packages/kubernetes/client/apis/rbac_authorization_v1beta1_api.py in list_cluster_role_binding_with_http_info(self, **kwargs)
   1790                                         _preload_content=params.get('_preload_content', True),
   1791                                         _request_timeout=params.get('_request_timeout'),
-> 1792                                         collection_formats=collection_formats)
   1793
   1794     def list_namespaced_role(self, namespace, **kwargs):

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in call_api(self, resource_path, method, path_params, query_params, header_params, body, post_params, files, response_type, auth_settings, async, _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    319                                    body, post_params, files,
    320                                    response_type, auth_settings,
--> 321                                    _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    322         else:
    323             thread = self.pool.apply_async(self.__call_api, (resource_path, method,

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __call_api(self, resource_path, method, path_params, query_params, header_params, body, post_params, files, response_type, auth_settings, _return_http_data_only, collection_formats, _preload_content, _request_timeout)
    161             # deserialize response data
    162             if response_type:
--> 163                 return_data = self.deserialize(response_data, response_type)
    164             else:
    165                 return_data = None

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in deserialize(self, response, response_type)
    234             data = response.data
    235
--> 236         return self.__deserialize(data, response_type)
    237
    238     def __deserialize(self, data, klass):

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    274             return self.__deserialize_datatime(data)
    275         else:
--> 276             return self.__deserialize_model(data, klass)
    277
    278     def call_api(self, resource_path, method,

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __deserialize_model(self, data, klass)
    618                    and isinstance(data, (list, dict)):
    619                     value = data[klass.attribute_map[attr]]
--> 620                     kwargs[attr] = self.__deserialize(value, attr_type)
    621
    622         instance = klass(**kwargs)

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    252                 sub_kls = re.match('list\[(.*)\]', klass).group(1)
    253                 return [self.__deserialize(sub_data, sub_kls)
--> 254                         for sub_data in data]
    255
    256             if klass.startswith('dict('):

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in <listcomp>(.0)
    252                 sub_kls = re.match('list\[(.*)\]', klass).group(1)
    253                 return [self.__deserialize(sub_data, sub_kls)
--> 254                         for sub_data in data]
    255
    256             if klass.startswith('dict('):

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __deserialize(self, data, klass)
    274             return self.__deserialize_datatime(data)
    275         else:
--> 276             return self.__deserialize_model(data, klass)
    277
    278     def call_api(self, resource_path, method,

/usr/local/lib/python3.6/site-packages/kubernetes/client/api_client.py in __deserialize_model(self, data, klass)
    620                     kwargs[attr] = self.__deserialize(value, attr_type)
    621
--> 622         instance = klass(**kwargs)
    623
    624         if hasattr(instance, 'get_real_child_model'):

/usr/local/lib/python3.6/site-packages/kubernetes/client/models/v1beta1_cluster_role_binding.py in __init__(self, api_version, kind, metadata, role_ref, subjects)
     66           self.metadata = metadata
     67         self.role_ref = role_ref
---> 68         self.subjects = subjects
     69
     70     @property

/usr/local/lib/python3.6/site-packages/kubernetes/client/models/v1beta1_cluster_role_binding.py in subjects(self, subjects)
    183         """
    184         if subjects is None:
--> 185             raise ValueError("Invalid value for `subjects`, must not be `None`")
    186
    187         self._subjects = subjects

ValueError: Invalid value for `subjects`, must not be `None`

=============================

    @subjects.setter
    def subjects(self, subjects):
        """
        Sets the subjects of this V1beta1ClusterRoleBinding.
        Subjects holds references to the objects the role applies to.

        :param subjects: The subjects of this V1beta1ClusterRoleBinding.
        :type: list[V1beta1Subject]
        """
        if subjects is None:
            raise ValueError("Invalid value for `subjects`, must not be `None`")

        self._subjects = subjects