old_contents: from attribute_dict import AttributeDict
  from alias_dict import AliasDict
  
  
  __version__ = "0.1.0"
  
  
  class Lexicon(AttributeDict, AliasDict):
      def __init__(self, *args, **kwargs):
          # Need to avoid combining AliasDict's initial attribute write on
          # self.aliases, with AttributeDict's __setattr__. Doing so results in
          # an infinite loop. Instead, just skip straight to dict() for both
          # explicitly (i.e. we override AliasDict.__init__ instead of extending
          # it.)
          # NOTE: could tickle AttributeDict.__init__ instead, in case it ever
          # grows one.
          dict.__init__(self, *args, **kwargs)
          dict.__setattr__(self, 'aliases', {})
  
new_contents: from attribute_dict import AttributeDict
  from alias_dict import AliasDict
  
  
  __version__ = "0.1.0"
  
  
  class Lexicon(AttributeDict, AliasDict):
      def __init__(self, *args, **kwargs):
          # Need to avoid combining AliasDict's initial attribute write on
          # self.aliases, with AttributeDict's __setattr__. Doing so results in
          # an infinite loop. Instead, just skip straight to dict() for both
          # explicitly (i.e. we override AliasDict.__init__ instead of extending
          # it.)
          # NOTE: could tickle AttributeDict.__init__ instead, in case it ever
          # grows one.
          dict.__init__(self, *args, **kwargs)
          dict.__setattr__(self, 'aliases', {})
  
      def __getattr__(self, key):
          # Intercept deepcopy/etc driven access to self.aliases when not
          # actually set. (Only a problem for us, due to abovementioned combo of
          # Alias and Attribute Dicts, so not solvable in a parent alone.)
          if key == 'aliases' and key not in self.__dict__:
              self.__dict__[key] = {}
          return super(Lexicon, self).__getattr__(key)
  
subject: Fix problems using Lexicons in deepcopy'd objects.