from copy import deepcopy class Prototype: def __init__(self): self._objs = {} def registerObject(self, name, obj): """ register an object. """ self._objs[name] = obj def unregisterObject(self, name): """unregister an object""" del self._objs[name] def clone(self, name, **attr): """clone a registered object and add/replace attr""" obj = deepcopy(self._objs[name]) obj.__dict__.update(attr) return obj