Convert dynamic python object to json [duplicate]

Question

Possible Duplicate:
Python serializable objects json

I need to know how to convert a dynamic python object into JSON. The object must be able to have multiple levels object child objects. For example:

class C(): pass class D(): pass  c = C() c.dynProperty1 = "something" c.dynProperty2 = { 1, 3, 5, 7, 9 } c.d = D() c.d.dynProperty3 = "d.something"  # ... convert c to json ... 

Using python 2.6 the following code:

import json  class C(): pass class D(): pass  c = C() c.what = "now?" c.now = "what?" c.d = D() c.d.what = "d.what"  json.dumps(c.__dict__) 

yields the following error:

TypeError: <__main__.D instance at 0x99237ec> is not JSON serializable 

I don't know what types of subobjects a user might put into c. Is there a solution that is smart enough to detect if an attribute is an object and parse it's __dict__ automatically?

UPDATED to include subobjects on c.

Answer 1

Specify the default= parameter ^(doc):

json.dumps(c, default=lambda o: o.__dict__) 

Answer 2

json.dumps(c.__dict__) 

That will give you a generic JSON object, if that's what you're going for.