Converting Cocoa objects in PyObjC return value to Python objects?

Question

I'm experimenting with retrieving network scan results from CoreWLAN in Python using PyObjC, with code that looks like:

from CoreWLAN import *
client = CWWiFiClient.sharedWiFiClient()
en0 = client.interface()
scan, _ = en0.scanForNetworksWithSSID_error_(None, None)

This returns an NSSet of CWNetwork objects into scan. I can convert the NSSet into a Python set easily enough, but is there a similarly straightforward way to convert the CWNetwork instances into Python dict or NamedTuple structures?

I only care about data members of the CWNetwork objects, and do not need to be able to pass messages to them again.

Note: the code above depends on an API introduced in OS X 10.10, and will not run on earlier versions of OS X.