old_contents: # -*- coding: utf-8 -*-
  '''
  This module contains all classes of exceptions raised
  by the library
  '''
  from __future__ import unicode_literals
  
  
  class SpamListsError(Exception):
      '''There was an error during testing a url or host'''
  
  
  class SpamListsValueError(SpamListsError, ValueError):
      '''An inapropriate value was used in SpamLists library '''
  
  
  class UnknownCodeError(SpamListsError, KeyError):
      '''The classification code from the service was not recognized'''
  
  
  class UnathorizedAPIKeyError(SpamListsError, ValueError):
      '''The API key used to query the service was not authorized'''
  
  
  class InvalidHostError(SpamListsError, ValueError):
      '''The value is not a valid host'''
  
  
  class InvalidIPError(InvalidHostError):
      ''' The value is not a valid IP address'''
  
  
  class InvalidIPv4Error(InvalidIPError):
      '''The value is not a valid IPv4 address'''
  
  
  class InvalidIPv6Error(InvalidIPError):
      '''The value is not a valid IPv6 address'''
  
  
  class InvalidHostnameError(InvalidHostError):
      '''The value is not a valid hostname'''
  
  
  class InvalidURLError(SpamListsError, ValueError):
      '''The value is not a valid url'''
  
new_contents: # -*- coding: utf-8 -*-
  '''
  This module contains all classes of exceptions raised
  by the library
  '''
  from __future__ import unicode_literals
  
  
  class SpamListsError(Exception):
      '''There was an error during testing a url or host'''
  
  
  class SpamListsValueError(SpamListsError, ValueError):
      '''An inapropriate value was used in SpamLists library '''
  
  
  class UnknownCodeError(SpamListsError, KeyError):
      '''The classification code from the service was not recognized'''
  
  
  class UnathorizedAPIKeyError(SpamListsValueError):
      '''The API key used to query the service was not authorized'''
  
  
  class InvalidHostError(SpamListsValueError):
      '''The value is not a valid host'''
  
  
  class InvalidIPError(InvalidHostError):
      ''' The value is not a valid IP address'''
  
  
  class InvalidIPv4Error(InvalidIPError):
      '''The value is not a valid IPv4 address'''
  
  
  class InvalidIPv6Error(InvalidIPError):
      '''The value is not a valid IPv6 address'''
  
  
  class InvalidHostnameError(InvalidHostError):
      '''The value is not a valid hostname'''
  
  
  class InvalidURLError(SpamListsValueError):
      '''The value is not a valid url'''
  
subject: Change bases of exception classes extending SpamListsError and ValueError