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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def evaluation_step(self, Xi, training=False):
 """Perform a forward step to produce the output used for prediction and scoring. Therefore the module is set to evaluation mode by default beforehand which can be overridden to re-enable features like dropout by setting ``training=True``. """

        with torch.set_grad_enabled(training):
            self.module_.train(training)
            return self.infer(Xi)