def register_monitors(self, *monitors):
        """
        Register monitors they should be tuple of name and Theano variable.
        """
        for key, node in monitors:
            if key not in self._registered_monitors:
                node *= 1.0 # Avoid CudaNdarray
                self.training_monitors.append((key, node))
                self.testing_monitors.append((key, node))
                self._registered_monitors.add(key)
Register monitors they should be tuple of name and Theano variable.