Synnefo

def camelCase(s):

    return s[0].lower() + s[1:]

class Fault(Exception):

    def __init__(self, message='', details='', name=''):

        Exception.__init__(self, message, details, name)

        self.message = message

        self.details = details

        self.name = name or camelCase(self.__class__.__name__)

class NotModified(Fault):

    code = 304

class BadRequest(Fault):

    code = 400

class Unauthorized(Fault):

    code = 401

class ResizeNotAllowed(Fault):

    code = 403

class ItemNotFound(Fault):

    code = 404

class Conflict(Fault):

    code = 409

class LengthRequired(Fault):

    code = 411

class PreconditionFailed(Fault):

    code = 412

class RangeNotSatisfiable(Fault):

    code = 416

class UnprocessableEntity(Fault):

    code = 422

class ServiceUnavailable(Fault):

    code = 503