NoneType' object has no attribute 'items'

Hi There

Stumbled upon this issue when building out a flask application but have also noticed this when just testing the code in a simple consistent loop.

Looking for pointers if there is something obvious I am missing in this.

Using Username/Password to authenticate.

Error usually occurs after 10-15 mins of running without issue.

SCRIPT CODE

foundation_name = 'lab'
target_endpoint = '<URL>'

proxy = dict(http=os.environ.get('HTTP_PROXY', ''), https=os.environ.get('HTTPS_PROXY', ''))
client = CloudFoundryClient(target_endpoint, proxy=proxy, verify=False)

client.init_with_user_credentials('<USERNAME>','<PAASWORD>')

def app_buildpacks():
	app_buildpack_usage = []
	app_buildpack_table_field_names = ['App Name', 'Buildpack Used', ' Buildpack Stack', 'GUID', 'Filename' , 'Locked']

	
	for app in client.v2.apps:
		app_name = app['entity']['name']
		app_buildpack_name = app['entity']['detected_buildpack'] or app['entity']['buildpack'] 
		app_buildpack_guid = app['entity']['detected_buildpack_guid']


		for buildpack in client.v2.buildpacks:

			buildpack_guid = buildpack['metadata']['guid']

			if app_buildpack_guid == buildpack_guid:

				buildpack_name = buildpack['entity']['name']
				buildpack_stack = buildpack['entity']['stack']
				buildpack_filename = buildpack['entity']['filename']
				buildpack_lock = buildpack['entity']['locked']

				d = { 
				'app_name' : app_name , 
				'buildpack_name' : buildpack_name,
				'buildpack_stack' : buildpack_stack , 
				'buildpack_guid' : buildpack_guid, 
				'buildpack_filename': buildpack_filename,
				'buildpack_lock' : buildpack_lock
				}

				app_buildpack_usage.append(d)

	# Sort the list by name 
	app_buildpack_usage = sorted(app_buildpack_usage, key = lambda i: i['buildpack_name'])
	
	# Return the two values ( Builpack usage list of dicts and table headers )
	return app_buildpack_usage,app_buildpack_table_field_names


def background():
  global app_buildpack_usage, app_buildpack_table_field_names

  while True:
    try:
        app_buildpack_usage,app_buildpack_table_field_names = app_buildpacks()



def foreground():
  @app.route('/app_buildpacks')
  def app_buildpacks_page():
    return render_template('app_buildpack_table.html', colnames=app_buildpack_table_field_names, app_buildpack_usage=app_buildpack_usage)



b = threading.Thread(name='background', target=background)
f = threading.Thread(name='foreground', target=foreground)


b.start()
f.start()

ERROR

  \Python37\lib\site-packages\cloudfoundry_client\v2\entities.py", line 66, in _list
    yield entity_builder(list(resource.items()))

  \Python37\lib\site-packages\cloudfoundry_client\v2\apps.py", line 51, in <lambda>
    lambda pairs: _Application(target_endpoint, client, pairs))

  \Python37\lib\site-packages\cloudfoundry_client\v2\entities.py", line 17, in __init__
    for attribute, value in list(self['entity'].items()):

AttributeError: 'NoneType' object has no attribute 'items'

Commencez par cloudfoundry_client/v2/entities.py au niveau de _list et par le constructeur _Application dans cloudfoundry_client/v2/apps.py, en utilisant la tracebacks fournie ainsi que les boucles répétées client.v2.apps et client.v2.buildpacks comme chemin de reproduction. Déterminez pourquoi une ressource listée possède une entité null après 10–15 minutes et ajoutez un test de régression pour cette réponse ; c’est terminé lorsque la boucle ne lève plus AttributeError.