Added linting and got tests passing

app/interface/tests/__init__.py

@@ -1,5 +1,5 @@
 from django.test import TestCase
-from interface import models, utils
+from interface import models
 from django.contrib.auth.models import User
 from django.utils import timezone
 from datetime import timedelta
@@ -16,7 +16,6 @@ class AccessTestCase(TestCase):
 
     @classmethod
     def setUpTestData(cls):
-
         cls.users = {}
         for details in cls.USERS:
             cls.users[details["username"]] = User.objects.create_user(**details)
@@ -42,7 +41,6 @@ class AccessTestCase(TestCase):
         return
 
     def test_protected_views(self):
-
         self.assertAccess({x: False for x in self.PROTECTED_URLS})
 
         if "admin" in self.users:

app/interface/urls.py

@@ -1,6 +1,7 @@
 from django.urls import path
 from django.contrib.auth import views as auth_views
 from django.views.generic.base import RedirectView
+from django.conf import settings
 
 from . import views
 
@@ -69,7 +70,6 @@ urlpatterns = [
     ),
 ]
 
-from django.conf import settings
 
 if settings.DEBUG:
     from django.views.static import serve

app/interface/utils.py

@@ -1,20 +1,19 @@
 from django.shortcuts import resolve_url
 from django.core.signing import Signer
 from django.core.exceptions import SuspiciousOperation
+import logging
 
 signer = Signer()
 
-import logging
-
 logger = logging.getLogger(__name__)
 
 
-def sign_data(data, l=None):
+def sign_data(data, length=None):
     sig = signer.sign(data)
-    p = len(data) + 1
-    if l:
-        l += p
-    return sig[p:l]
+    pos = len(data) + 1
+    if length:
+        length += pos
+    return sig[pos:length]
 
 
 def signed_url(name, **kwargs):