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
def image(self):
if self._image is None:
self._image = Image.from_blob(self.blob)
return self._image
