How do I store a fetched entity in memcache for App Engine?

Because each new request in App Engine creates a new Handler, the entity I'd like to alter and put (using POST) has to be retrieved again. This seems wasteful, since I've populated the form with the information from GET a m开发者_如何学Gooment earlier.

How do I store a key, fetched entity, or key/entity pair in memcache for App Engine?

From here:

def get_data():
    data = memcache.get("key")
    if data is not None:
        return data
    else:
        data = self.query_for_data()
        memcache.add("key", data, 60)
        return data

Memcache will store anything that is 'pickleable'.

You get access to memcache with the following import:

from google.appengine.api import memcache

I've been developing a simple library that enables different storage layers for datastore entities, it allows you to fetch models from datastore,memcache or local instance. You can give it a try.