import copy
import csv
import datetime
-from cStringIO import StringIO
import os
import tempfile
from django.contrib import messages
from django.db.models import Q
from django.http import HttpResponse, HttpResponseRedirect
+from django.utils.six import StringIO
from django.utils.translation import ugettext_lazy as _
from django.views.generic.base import RedirectView, TemplateView
from django.views.generic.dates import DayArchiveView