serialize and deserialze model with GAE

gistfile1.py

# Largely inspired by: http://blog.notdot.net/2009/9/Efficient-model-memcaching

def serialize(models):
    if isinstance(models, db.Model):
        return db.model_to_protobuf(models).Encode()
    elif isinstance(models, list):
        return [serialize(x) for x in models]
    elif isinstance(models, dict):
	return dict([(k, serialize(x)) for k, x in models.items()])

def deserialize(data):
    if isinstance(data, basestring):
        return db.model_from_protobuf(datastore.entity_pb.EntityProto(data))
    elif isinstance(data, list):
        return [deserialize (x) for x in data]
    elif isinstance(data, dict):
        return dict([(k, deserialize(x)) for k, x in data.items()])