Ask HN: Can you help with Google App Engine question?

Hello:

I have been reading the Google App Engine documentation to learn how to use the Images Python API. I asked several questions in the appropriate forums but so far there were no relevant answers. I was wondering if an expert here help me out with this. I put the entire script here http://pastebin.com/dxWJPNCa

These are the questions that I asked in StackOverflow and Google groups for GAE:

http://stackoverflow.com/questions/4353939/how-to-write-an-image-to-datastore

http://stackoverflow.com/questions/4350193/how-to-display-an-image-from-blobstore

http://stackoverflow.com/questions/4351375/how-to-use-images-python-api-correctly-to-display-an-avatar-with-user-comments

http://groups.google.com/group/google-appengine/browse_thread/thread/3c55ed3461e6395b?hl=en#

These are the sample code that I am trying to copy:

http://www.renepedersen.com/2010/04/12/how-to-serve-images-dynamically-from-google-engines-datastore/

http://code.google.com/appengine/docs/python/images/usingimages.html#Serving

Thanks!