Add a Django command for dumping the email address of all subscribers

coin/offers/management/commands/subscribers_email.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+import datetime
+
+from django.core.management.base import BaseCommand, CommandError
+from django.db.models import Q
+
+from coin.offers.models import OfferSubscription
+
+
+class Command(BaseCommand):
+    help = 'Returns the email addresses of all subscribers, in a format suitable for bulk importing in Sympa'
+
+    def handle(self, *args, **options):
+        emails = [s.member.email for s in OfferSubscription.objects.filter(Q(resign_date__gt=datetime.date.today) | Q(resign_date__isnull=True))]
+        # Use a set to ensure uniqueness
+        for email in set(emails):
+            self.stdout.write(email)