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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 transform(self, images):
 """ Apply the transformation to an Images object. Will apply the underlying dictionary of transformations to the images or volumes of the Images object. The dictionary acts as a lookup table specifying which transformation should be applied to which record of the Images object based on the key. Because transformations are small, we broadcast the transformations rather than using a join. Parameters images : array-like or thunder images The sequence of images / volumes to register. """

        images = check_images(images)

        def apply(item):
            (k, v) = item
            return self.transformations[k].apply(v)

        return images.map(apply, value_shape=images.value_shape, dtype=images.dtype, with_keys=True)