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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 restore(self, image):
 """ Restore the droplet to the specified backup image A Droplet restoration will rebuild an image using a backup image. The image ID that is passed in must be a backup of the current Droplet instance. The operation will leave any embedded SSH keys intact. [APIDocs]_ :param image: an image ID, an image slug, or an `Image` object representing a backup image of the droplet :type image: integer, string, or `Image` :return: an `Action` representing the in-progress operation on the droplet :rtype: Action :raises DOAPIError: if the API endpoint replies with an error """

        if isinstance(image, Image):
            image = image.id
        return self.act(type='restore', image=image)