class attr_dict(dict):
	def __getattr__(self, name):
		if name in self:
			return self[name]
		else:
			return super(attr_dict, self).__getattr__(name)

	def __getitem__(self, key):
		res = super(attr_dict, self).__getitem__(key)

		if isinstance(res, dict):
			return attr_dict(res)
		return res

class _MetaInfo(object):
	def __init__(self, **kwargs):
		for name, value in kwargs.items():
			setattr(self, name, value)
		self.structure = []