Migrate source code to python 3.7 and refine code style

console/novncd

@@ -20,11 +20,11 @@ django.setup()
 #     sys.path.append(VENV_PATH)
 
 import re
-import Cookie
+import http.cookies
 import socket
 from webvirtcloud.settings import WS_PORT, WS_HOST, WS_CERT
 from vrtManager.connection import CONN_SSH, CONN_SOCKET
-from tunnel import Tunnel
+from console.tunnel import Tunnel
 
 from optparse import OptionParser
 parser = OptionParser()
@@ -120,7 +120,7 @@ def get_connection_infos(token):
         console_host = conn.get_console_listen_addr()
         console_port = conn.get_console_port()
         console_socket = conn.get_console_socket()
-    except Exception, e:
+    except Exception as e:
         logging.error('Fail to retrieve console connection infos for token %s : %s' % (token, e))
         raise
     return (connhost, connport, connuser, conntype, console_host,
@@ -129,7 +129,7 @@ def get_connection_infos(token):
 
 class CompatibilityMixIn(object):
     def _new_client(self, daemon, socket_factory):
-        cookie = Cookie.SimpleCookie()
+        cookie = http.cookies.SimpleCookie()
         cookie.load(self.headers.getheader('cookie'))
         if 'token' not in cookie:
             self.msg('No token cookie found !')

console/tunnel.py

@@ -27,6 +27,7 @@ import os
 import socket
 import signal
 import logging
+from functools import reduce
 
 
 class Tunnel(object):

console/views.py

@@ -1,7 +1,5 @@
 import re
 from django.shortcuts import render
-from django.http import HttpResponseRedirect
-from django.core.urlresolvers import reverse
 from django.contrib.auth.decorators import login_required
 from instances.models import Instance
 from vrtManager.instance import wvmInstance