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from .attribute_dict import AttributeDict
from .alias_dict import AliasDict
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)
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