diff --git a/src/pybind/mgr/dashboard/controllers/__init__.py b/src/pybind/mgr/dashboard/controllers/__init__.py
index af79f8ac2ab..28f5998e876 100644
--- a/src/pybind/mgr/dashboard/controllers/__init__.py
+++ b/src/pybind/mgr/dashboard/controllers/__init__.py
@@ -9,7 +9,6 @@ import json
 import os
 import pkgutil
 import sys
-from six import add_metaclass
 
 if sys.version_info >= (3, 0):
     from urllib.parse import unquote  # pylint: disable=no-name-in-module,import-error
diff --git a/src/pybind/mgr/dashboard/controllers/iscsi.py b/src/pybind/mgr/dashboard/controllers/iscsi.py
index f6267f76413..f67037cab0b 100644
--- a/src/pybind/mgr/dashboard/controllers/iscsi.py
+++ b/src/pybind/mgr/dashboard/controllers/iscsi.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 # pylint: disable=too-many-branches
-
 from __future__ import absolute_import
 
 from copy import deepcopy
diff --git a/src/pybind/mgr/dashboard/controllers/pool.py b/src/pybind/mgr/dashboard/controllers/pool.py
index b20e19842f1..5732674b01a 100644
--- a/src/pybind/mgr/dashboard/controllers/pool.py
+++ b/src/pybind/mgr/dashboard/controllers/pool.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import
 
-
 import cherrypy
 
 from . import ApiController, RESTController, Endpoint, ReadPermission, Task
diff --git a/src/pybind/mgr/dashboard/controllers/settings.py b/src/pybind/mgr/dashboard/controllers/settings.py
index 2f2ec3e902e..a484580ee1c 100644
--- a/src/pybind/mgr/dashboard/controllers/settings.py
+++ b/src/pybind/mgr/dashboard/controllers/settings.py
@@ -4,7 +4,6 @@ from contextlib import contextmanager
 
 import cherrypy
 
-
 from . import ApiController, RESTController
 from ..settings import Settings as SettingsModule, Options
 from ..security import Scope
diff --git a/src/pybind/mgr/dashboard/controllers/summary.py b/src/pybind/mgr/dashboard/controllers/summary.py
index 2571b281cfd..0b2d51e5274 100644
--- a/src/pybind/mgr/dashboard/controllers/summary.py
+++ b/src/pybind/mgr/dashboard/controllers/summary.py
@@ -3,7 +3,6 @@ from __future__ import absolute_import
 
 import json
 
-
 from . import ApiController, Endpoint, BaseController
 from .. import mgr
 from ..security import Permission, Scope
diff --git a/src/pybind/mgr/dashboard/plugins/lru_cache.py b/src/pybind/mgr/dashboard/plugins/lru_cache.py
index 82ec0c74983..19ad1b85062 100644
--- a/src/pybind/mgr/dashboard/plugins/lru_cache.py
+++ b/src/pybind/mgr/dashboard/plugins/lru_cache.py
@@ -4,7 +4,6 @@ This is a minimal implementation of lru_cache function.
 
 Based on Python 3 functools and backports.functools_lru_cache.
 """
-
 from __future__ import absolute_import
 
 from functools import wraps
diff --git a/src/pybind/mgr/dashboard/plugins/ttl_cache.py b/src/pybind/mgr/dashboard/plugins/ttl_cache.py
index 8a7715b10b5..a0698542b43 100644
--- a/src/pybind/mgr/dashboard/plugins/ttl_cache.py
+++ b/src/pybind/mgr/dashboard/plugins/ttl_cache.py
@@ -3,7 +3,6 @@ This is a minimal implementation of TTL-ed lru_cache function.
 
 Based on Python 3 functools and backports.functools_lru_cache.
 """
-
 from __future__ import absolute_import
 
 from functools import wraps