Ruby's Openstruct alternative in Python

openstruct.py

class OpenStruct:
    def __init__(self, **dic):
        self.__dict__.update(dic)
    def __getattr__(self, i):
        if i in self.__dict__:
            return self.__dict__[i]
        else:
            None
    def __setattr__(self,i,v):
        if i in self.__dict__:
            self.__dict__[i] = v
        else:
            self.__dict__.update({i:v})
        return v # i like cascates :)