send_feedback_mails.py

from event.models import Event
from django.core.mail import EmailMessage
import csv
import io

e = Event.objects.current_event()

email = EmailMessage(
    "Speakerfeedback für {}".format(e.title),
    "Im Anhang ist das Speaker feedback für den {}".format(e.title),
    "webmaster@devday.de",
    ("user@example.org",))

for t in e.talk_set.filter(track__isnull=False):
	filename="{}-{}.csv".format(t.published_speaker.slug, t.slug)
	csvfile = io.StringIO()
	csvwriter = csv.writer(csvfile, delimiter=";", quoting=csv.QUOTE_ALL)
	for f in t.attendeefeedback_set.all():
		csvwriter.writerow(["{} von 5".format(f.score), f.comment or "-"])
	email.attach(filename, csvfile.getvalue(), "text/csv; charset=utf-8")

email.send()