def GetPrices(prediction_id):
prices = Price.query(Price.prediction_id == ndb.Key(urlsafe=prediction_id)).order(-Price.date).fetch(30)
print(str(prices))
prices = [{'price': p.value, 'date': {'year': p.date.year, 'month': p.date.month, 'day': p.date.day}} for p in prices]
return prices
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