Some linter setup

members/models.py

@@ -3,8 +3,7 @@
 from django.db import models
 from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
-from django.db.models import Q, F, OuterRef, Subquery
-import csv
+from django.db.models import Q, OuterRef, Subquery
 
 
 class BaseMember(models.Model):
@@ -124,11 +123,8 @@ class Member(BaseMember):
             qs = qs.filter(Q(first_name__icontains=term) | Q(last_name__icontains=term))
         return qs
 
+    @staticmethod
     def get_members_with_latest_payment(members_query):
         """Return QuerySet of given members QS with last_paid attribute."""
         latest = Payment.objects.filter(member=OuterRef('pk')).order_by('-date')
         return members_query.annotate(last_paid=Subquery(latest.values('date')[:1]))
-
-
-# To avoid problems with a cyclical import, this is at the bottom of the file
-from members.forms import MemberForm  # nopep8