def json_validator(value):
	try:
		json.loads(value)
	except Exception, e:
		raise ValidationError(u'JSON decode error: %s' % e)
Apply the transformation (if it exists) to the latest_value
dataset/ETHPy150Open ithinksw/philo/philo/validators.py/json_validator--crossover with--dataset/ETHPy150Open lincolnloop/salmon/salmon/metrics/models.py/Metric.do_transform