Send a “304 Not Modified” for images stored in the datastore

Question

I store user-uploaded images in the Google App Engine datastore as db.Blob, as proposed in the docs. I then serve those images on /images/.jpg

Answer 1

why would the code use this:

 self.response.headers['ETag'] = '"%s"' % (content.etag,)

instead of this:

 self.response.headers['ETag'] = '"%s"' % content.etag

I think it is the same and will use the 2nd unless someone explains the reasoning.