def clean(self, value):
        if isinstance(value, six.string_types):
            if value == "":
                value = None
            try:
                value = json.loads(value)
            except ValueError:
                raise ValidationError("Could not parse value as JSON")
        return value


#Basic obfuscation, just so that the db_table doesn't
#appear in forms. (Not the end of the world if it does, but it's nice to
# hide these things). We don't encrypt for performance reasons.
#http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher
Removes data above the nth percentile from the series or list of series
dataset/ETHPy150Open potatolondon/djangae/djangae/forms/fields.py/JSONFormField.clean--crossover with--dataset/ETHPy150Open brutasse/graphite-api/graphite_api/functions.py/removeAbovePercentile