Response to each single JSON-RPC Request.

        :return iterator(JSONRPC20Response):

        .. versionadded: 1.9.0
          TypeError inside the function is distinguished from Invalid Params.

def _get_responses(cls, requests, dispatcher):
        """ Response to each single JSON-RPC Request.

        :return iterator(JSONRPC20Response):

        .. versionadded: 1.9.0
          TypeError inside the function is distinguished from Invalid Params.

        """
        for request in requests:
            def response(**kwargs):
                return cls.RESPONSE_CLASS_MAP[request.JSONRPC_VERSION](
                    _id=request._id, **kwargs)

            try:
                method = dispatcher[request.method]
            except KeyError:
                output = response(error=JSONRPCMethodNotFound()._data)
            else:
                try:
                    result = method(*request.args, **request.kwargs)
                except JSONRPCDispatchException as e:
                    output = response(error=e.error._data)
                except Exception as e:
                    data = {
                        "type": e.__class__.__name__,
                        "args": e.args,
                        "message": str(e),
                    }
                    if isinstance(e, TypeError) and is_invalid_params(
                            method, *request.args, **request.kwargs):
                        output = response(
                            error=JSONRPCInvalidParams(data=data)._data)
                    else:
                        # logger.exception("API Exception: {0}".format(data))
                        print("API Exception: {0}".format(data))
                        output = response(
                            error=JSONRPCServerError(data=data)._data)
                else:
                    output = response(result=result)
            finally:
                if not request.is_notification:
                    yield output