[statistics][views] Moved from render_to_response to render

render_to_response is deprecated in Django 2.0 and render has
been available since 1.3. It's shorter to write and avoids the
writing of context_instance=RequestContext(request) in each of
its call.

beat/web/statistics/views.py

@@ -31,14 +31,14 @@ import itertools
 
 import simplejson
 
-from django.shortcuts import render_to_response
-from django.template import RequestContext
+from django.shortcuts import render
 from django.contrib.auth.decorators import login_required
 from django.http import HttpResponseForbidden
 from django.db.models import Sum
 
 from .models import HourlyStatistics
 
+
 def calculate_totals():
     """Caculates all totals required by the statistics display"""
 
@@ -269,11 +269,11 @@ def statistics(request):
 
     if not(request.user.is_superuser): return HttpResponseForbidden()
 
-    return render_to_response('statistics/statistics.html',
-                              dict(
-                                  totals=calculate_totals(),
-                                  hourly_chart_data=hourly_charts(),
-                                  daily_chart_data=daily_charts(),
-                                  weekly_chart_data=weekly_charts(),
-                              ),
-                              context_instance=RequestContext(request))
+    return render(request,
+                  'statistics/statistics.html',
+                  dict(
+                      totals=calculate_totals(),
+                      hourly_chart_data=hourly_charts(),
+                      daily_chart_data=daily_charts(),
+                      weekly_chart_data=weekly_charts(),
+                  ))