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

datasource/urls.py

@@ -1,4 +1,5 @@
 from django.urls import path
+
 from . import views
 
 urlpatterns = [

datasource/views.py

@@ -1,14 +1,16 @@
 import json
 import socket
+
 from django.shortcuts import render, get_object_or_404
 from django.http import HttpResponse, Http404
 from libvirt import libvirtError
+
 from accounts.models import UserInstance, UserSSHKey
 from computes.models import Compute
 from vrtManager.instance import wvmInstance
 
 
-OS_VERSIONS = ['latest', '']
+OS_VERSIONS = ["latest", ""]
 OS_UUID = "iid-dswebvirtcloud"
 
 
@@ -17,7 +19,7 @@ def os_index(request):
     :param request:
     :return:
     """
-    response = '\n'.join(OS_VERSIONS)
+    response = "\n".join(OS_VERSIONS)
     return HttpResponse(response)
 
 
@@ -28,13 +30,13 @@ def os_metadata_json(request, version):
     :return:
     """
 
-    if version == 'latest':
+    if version == "latest":
         ip = get_client_ip(request)
         hostname = get_hostname_by_ip(ip)
-        response = {'uuid': OS_UUID, 'hostname': hostname}
+        response = {"uuid": OS_UUID, "hostname": hostname}
         return HttpResponse(json.dumps(response))
     else:
-        err = f"Invalid version: {version}"
+        err = "Invalid version: %(version)s" % {"version": version}
         raise Http404(err)
 
 
@@ -44,10 +46,10 @@ def os_userdata(request, version):
     :param version:
     :return:
     """
-    if version == 'latest':
+    if version == "latest":
         ip = get_client_ip(request)
         hostname = get_hostname_by_ip(ip)
-        vname = hostname.split('.')[0]
+        vname = hostname.split(".")[0]
 
         instance_keys = []
         userinstances = UserInstance.objects.filter(instance__name=vname)
@@ -57,9 +59,9 @@ def os_userdata(request, version):
             for k in keys:
                 instance_keys.append(k.keypublic)
 
-        return render(request, 'user_data', locals())
+        return render(request, "user_data", locals())
     else:
-        err = f"Invalid version: {version}"
+        err = "Invalid version: %(version)s" % {"version": version}
         raise Http404(err)
 
 
@@ -68,11 +70,11 @@ def get_client_ip(request):
     :param request:
     :return:
     """
-    x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
+    x_forwarded_for = request.META.get("HTTP_X_FORWARDED_FOR")
     if x_forwarded_for:
-        ip = x_forwarded_for.split(',')[-1].strip()
+        ip = x_forwarded_for.split(",")[-1].strip()
     else:
-        ip = request.META.get('REMOTE_ADDR')
+        ip = request.META.get("REMOTE_ADDR")
     return ip
 
 
@@ -97,16 +99,12 @@ def get_vdi_url(request, compute_id, vname):
     compute = get_object_or_404(Compute, pk=compute_id)
 
     try:
-        conn = wvmInstance(compute.hostname,
-                           compute.login,
-                           compute.password,
-                           compute.type,
-                           vname)
+        conn = wvmInstance(compute.hostname, compute.login, compute.password, compute.type, vname)
 
         fqdn = get_hostname_by_ip(compute.hostname)
         url = f"{conn.get_console_type()}://{fqdn}:{conn.get_console_port()}"
         response = url
         return HttpResponse(response)
     except libvirtError:
-        err = f"Error getting VDI URL for {vname}"
+        err = "Error getting VDI URL for %(name)s" % {"name": vname}
         raise Http404(err)