fix typo + pep8 + del future imports

kfet/backends.py

@@ -1,15 +1,12 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
-
 import hashlib
 
 from django.contrib.auth.models import User, Permission
 from gestioncof.models import CofProfile
 from kfet.models import Account, GenericTeamToken
 
+
 class KFetBackend(object):
     def authenticate(self, request):
         password = request.POST.get('KFETPASSWORD', '')
@@ -18,13 +15,15 @@ class KFetBackend(object):
             return None
 
         try:
-            password_sha256 = hashlib.sha256(password.encode('utf-8')).hexdigest()
+            password_sha256 = (
+                hashlib.sha256(password.encode('utf-8'))
+                .hexdigest()
+            )
             account = Account.objects.get(password=password_sha256)
-            user = account.cofprofile.user
+            return account.cofprofile.user
         except Account.DoesNotExist:
             return None
 
-        return user
 
 class GenericTeamBackend(object):
     def authenticate(self, username=None, token=None):
@@ -48,7 +47,7 @@ class GenericTeamBackend(object):
         try:
             return (
                 User.objects
-                .select_related('profile__acount_kfet')
+                .select_related('profile__account_kfet')
                 .get(pk=user_id)
             )
         except User.DoesNotExist: