def __call__(self, *inputs, **kwargs):
if (len(inputs) > self._schema.MaxNumInput() or
len(inputs) < self._schema.MinNumInput()):
raise ValueError(
("Operator {} expects [{}, " +
"{}] inputs, but received {}")
.format(type(self).__name__,
self._schema.MinNumInput(),
self._schema.MaxNumInput(),
len(inputs)))
op_instance = _OperatorInstance(inputs, self, **kwargs)
t_name = "PythonFunctionImpl" + "_id_" + str(op_instance.id)
t = EdgeReference(t_name, self._device, op_instance)
op_instance.spec.AddOutput(t.name, t.device)
op_instance.append_output(t)
op_instance.spec.AddArg("function_id", id(self.function))
return t
