How would one make Python objects persistent in a web-app?

Question

I\'m writing a reasonably complex web application. The Python backend runs an algorithm whose state depends on data stored in several interrelated database tables which does not

Answer 1

I think you can give ZODB a shot.

"A major feature of ZODB is transparency. You do not need to write any code to explicitly read or write your objects to or from a database. You just put your persistent objects into a container that works just like a Python dictionary. Everything inside this dictionary is saved in the database. This dictionary is said to be the "root" of the database. It's like a magic bag; any Python object that you put inside it becomes persistent."

Initailly it was a integral part of Zope, but lately a standalone package is also available.

It has the following limitation:

"Actually there are a few restrictions on what you can store in the ZODB. You can store any objects that can be "pickled" into a standard, cross-platform serial format. Objects like lists, dictionaries, and numbers can be pickled. Objects like files, sockets, and Python code objects, cannot be stored in the database because they cannot be pickled."

I have read it but haven't given it a shot myself though.

Other possible thing could be a in-memory sqlite db, that may speed up the process a bit - being an in-memory db, but still you would have to do the serialization stuff and all. Note: In memory db is expensive on resources.

Here is a link: http://www.zope.org/Documentation/Articles/ZODB1