def to_python(self, value):
    Field.to_python(self, value)
    if (value is not None):
        try:
            tmp = value.split(self._delim)
            return tmp
        except ValueError as e:
            raise FieldValidationException(str(e))
    else:
        return None
def to_python(self, value):
    Field.to_python(self, value)
    if (value is not None):
        try:
            tmp = value.split(self._delim)
            return tmp
        except ValueError as e:
            raise FieldValidationException(str(e))
    else:
        return None