protract.py

import pykka
class Prototype(pykka.ThreadingActor):
    def __init__(self, *args, **kw):
        import treedict
        self.properties = treedict.TreeDict()
        self.properties.pykka_traversable = True
        super().__init__(*args, **kw)
    def clone(self):
        new_obj = Prototype.start().proxy()
        new_obj.properties.attach(self.properties, copy=False).get()
        return new_obj