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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def validate(self):
 """ Using the SCHEMA property, validate the attributes of this instance. If any attributes are missing or invalid, raise a ValidationException. """

        validator = Draft7Validator(self.SCHEMA)

        errors = set()  # make errors a set to avoid duplicates

        for error in validator.iter_errors(self.serialize()):
            errors.add('.'.join(
                list(map(str, error.path)) + [error.message]
            ))

        if errors:
            raise JSONValidationException(type(self).__name__, errors)