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- import copy
- class Prototype:
- def __init__(self):
- self._objects = {}
- def register_object(self, name, obj):
- """Register an object"""
- self._objects[name] = obj
- def unregister_object(self, name):
- """Unregister an object"""
- del self._objects[name]
- def clone(self, name, **attr):
- """Clone a registered object and update inner attributes dictionary"""
- obj = copy.deepcopy(self._objects.get(name))
- obj.__dict__.update(attr)
- return obj
- def main():
- class A:
- pass
- a = A()
- prototype = Prototype()
- prototype.register_object('a', a)
- b = prototype.clone('a', a=1, b=2, c=3)
- print(a)
- print(b.a, b.b, b.c)
- if __name__ == '__main__':
- main()
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