use a dictionary for context (django 1.11)

passerelle_montpellier_encombrants/utils.py

@@ -23,7 +23,6 @@ from io import BytesIO
 from django.core.mail import EmailMessage
 from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
-from django.template import Context
 from django.template.loader import get_template
 
 from .models import Commune
@@ -92,7 +91,7 @@ def email_sectors(formdatas, when):
 
     sectors = defaultdict(list)
 
-    context = Context({'date': when})
+    context = {'date': when}
     for data in formdatas:
         fields = data['fields']