def get_or_add_image_part(self, image_descriptor): """ Return an |ImagePart| instance containing the image identified by *image_descriptor*, newly created if a matching one is not present in the collection. """ image = Image.from_file(image_descriptor) matching_image_part = self._get_by_sha1(image.sha1) if matching_image_part is not None: return matching_image_part return self._add_image_part(image)
def image(self): if self._image is None: self._image = Image.from_blob(self.blob) return self._image