title: trying to retrieve file from blobstore and send it as mail attachment using google app engine
body: <p>I am trying to design an application that would require me to retrieve data stored in blobstore and send it as attachment. Does google app engine allow this?  From the documentation, i could not find a way to retrieve data from blobstore for processing within the app.. can someone please tell me how to accomplish this? Code examples and/or pointers to related online resources would be really helpful.</p>