Re: [SciPy-Dev] Proposal: calling signal.lti object returns transfer function value

BTW (and this is a side question), is there a reason the code of signal.lti is full of `self.__dict__['X'] = Y` instead of `self.X = Y`? https://github.com/scipy/scipy/blob/v0.12.0/scipy/signal/ltisys.py#L262