from marshmallow import ValidationError class MismatchBetweenIds(ValidationError): def __init__(self, other_device_id: int, field: str, value: str): message = 'The device {} has the same {} than this one ({}).'.format(other_device_id, field, value) super().__init__(message, field_names=[field]) class NeedsId(ValidationError): def __init__(self): message = 'We couldn\'t get an ID for this device. Is this a custom PC?' super().__init__(message)