Indeed there is: Python comes with the cPickle module, that lets you
serialize any builtin Python data to disk. It has a dump method that does
that writing to your filesystem, but it also had a dumps (dump string) that
writes it as a string.
In Maya, you can make string attrs on your nodes...
pseudo code, not directly tested but you get the idea
import cPickle
data = {"a":1, "b":2}
stringData = cPickle.dumps(data)
# Add a custom string attr to your node and:
mc.setAttr("myObj.stringAttr", stringData, type='string')
# Then later to query it:
stringAttrData = str(mc.getAttr("myObj.stringAttr"))
loadedData = cPickle.loads(stringAttrData)
print loadedData
{"a":1, "b":2}
I do this *all* the time to just get away from having to deal with Maya's
own attr types. So much more flexibility in data storage on Maya nodes.
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