Used isort to order all import statements

src/pretix/base/services/locking.py

@@ -1,9 +1,10 @@
-from datetime import timedelta
 import logging
 import time
+from datetime import timedelta
+
+from django.conf import settings
 from django.db.models import Q
 from django.utils.timezone import now
-from pretix import settings
 
 from pretix.base.models import Quota
 

src/pretix/base/services/mail.py

@@ -1,4 +1,5 @@
 import logging
+
 from django.conf import settings
 from django.core.mail import EmailMessage
 from django.core.urlresolvers import reverse
@@ -7,7 +8,7 @@ from django.utils import translation
 from django.utils.translation import ugettext as _
 
 from pretix.base.i18n import LazyI18nString
-from pretix.base.models import User, Event
+from pretix.base.models import Event, User
 from pretix.helpers.urls import build_absolute_uri
 
 logger = logging.getLogger('pretix.base.mail')

src/pretix/base/services/orders.py

@@ -1,8 +1,10 @@
-from datetime import timedelta, datetime
+from datetime import datetime, timedelta
+
 from django.db import transaction
 from django.utils.timezone import now
-from pretix.base.models import Order, Quota, OrderPosition
 from django.utils.translation import ugettext_lazy as _
+
+from pretix.base.models import Order, OrderPosition, Quota
 from pretix.base.services.mail import mail
 from pretix.helpers.urls import build_absolute_uri