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'

Bắt đầu với cloudfoundry_client/v2/entities.py tại _list và constructor _Application trong cloudfoundry_client/v2/apps.py, sử dụng traceback được cung cấp cùng các vòng lặp lặp lại client.v2.apps và client.v2.buildpacks làm đường dẫn tái hiện. Xác định lý do một tài nguyên được liệt kê có entity null sau 10–15 phút và thêm một regression test cho response đó; hoàn thành khi vòng lặp không còn phát sinh AttributeError.