[Answered ]-Django + calculating with /

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You can use Avg to calculate an average:

score = Voto.objects.filter(look=look).aggregate(score=Avg('valor'))['score']

The reason your code doesn’t work, is because num_votos is a queryset, and not a number. If you’d used score = valores['soma'] / num_votos.count() it would’ve worked.

If you’re using Python 2, valores['soma'] / num_votos.count() would still be an integer division and return an integer, not a real average. Use from __future__ import division to convert it to ‘true division’, so it returns a float.

👤knbk

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