Google-App-Engine-Like Datastore for Python

Question

Is there any software library that provides an interface for storing and querying data like the Google App Engine Datastore, but uses a local file or service instead of running on App Engine?

The specific features I am looking for are:

• Stores data as Entities with Named Properties
• Query support
• Atomic transactions
• Python language bindings
• Runs on my local machine
  • either stores to a single file
  • or connects to a local database service
• Free and open source

Thanks

Answer 1

You can also check MongoDB . It is an open source document-oriented database system.

Answer 2

You may also want to check out Appscale ( http://www.appscale.com ). It lets you run your App Engine apps without modification outside of Google (on your laptop, on your local cluster / behind your firewall, or in Amazon EC2). AppScale is and does each of the requirements you list here. It automatically installs/configures/manages the datastore service (and all other APIs/services) for your apps to use, so you don't have to.

Answer 3

Have a look at ZODB - not exactly alike but similiar http://www.zodb.org/

from the docs

Some of the features that ZODB brings to you:

• Transparent persistence for Python objects
• Full ACID-compatible
• transaction support (including savepoints) History/undo ability
• Efficient support for binary large objects (BLOBs)
• Pluggable storages
• Scalable architecture