---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<command-915677376113286> in <module>()
     17 
     18   try:
---> 19     client.clusters.get(cluster_name)
     20     print("  Cluster '{0}' already exists".format(cluster_name))
     21   except ResourceDoesNotExist:

/databricks/python/lib/python3.5/site-packages/azure_databricks_api/__clusters.py in get(self, cluster_name, cluster_id)
    355                                                   api_path=API_PATH,
    356                                                   cluster_name=cluster_name,
--> 357                                                   cluster_id=cluster_id)
    358 
    359     def pin(self, cluster_name=None, cluster_id=None):

/databricks/python/lib/python3.5/site-packages/azure_databricks_api/__clusters.py in __send_cluster_id_to_endpoint(self, method, api_path, cluster_name, cluster_id)
    200 
    201         if cluster_name and not cluster_id:
--> 202             cluster_id = self.get_cluster_id(cluster_name)
    203 
    204         data = {"cluster_id": cluster_id}

/databricks/python/lib/python3.5/site-packages/azure_databricks_api/__clusters.py in get_cluster_id(self, cluster_name)
    312         found_clusters = [
    313             ClusterInfo(id=cluster['cluster_id'], state=cluster['state'], start_time=cluster['start_time'])
--> 314             for cluster in clusters if cluster['cluster_name'] == cluster_name]
    315 
    316         if len(found_clusters) == 0:

TypeError: 'NoneType' object is not iterable