lint with black python. convert f style strings to old one. some small fixes

console/sshtunnels.py

@@ -4,14 +4,13 @@
 # See the COPYING file in the top-level directory.
 
 import functools
+import logging as log
 import os
 import queue
-import socket
 import signal
+import socket
 import threading
 
-import logging as log
-
 
 class _TunnelScheduler(object):
     """

console/views.py

@@ -6,7 +6,11 @@ from libvirt import libvirtError
 from appsettings.settings import app_settings
 from instances.models import Instance
 from vrtManager.instance import wvmInstance
-from webvirtcloud.settings import WS_PUBLIC_HOST, WS_PUBLIC_PATH, WS_PUBLIC_PORT
+from webvirtcloud.settings import (
+    WS_PUBLIC_HOST,
+    WS_PUBLIC_PATH,
+    WS_PUBLIC_PORT,
+)
 
 
 def console(request):
@@ -61,7 +65,7 @@ def console(request):
         if console_type is None:
             console_error = "Fail to get console. Please check the console configuration of your VM."
         else:
-            console_error = f"Console type: {console_type} no support"
+            console_error = "Console type '%(type)s' has not support" % {"type": console_type}
         response = render(request, "console-vnc-lite.html", locals())
 
     response.set_cookie("token", token)