Used isort to order all import statements

src/pretix/base/ticketoutput.py

@@ -1,10 +1,10 @@
 from collections import OrderedDict
-from django import forms
 
+from django import forms
 from django.http import HttpRequest, HttpResponse
 from django.utils.translation import ugettext_lazy as _
-from pretix.base.models import Order
 
+from pretix.base.models import Order
 from pretix.base.settings import SettingsSandbox