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prototype.py

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#!/usr/bin/env python

# -*- coding: utf-8 -*-

import copy

class Prototype:

value = 'default'

def clone(self, **attrs):

"""Clone a prototype and update inner attributes dictionary"""

obj = copy.deepcopy(self)

obj.__dict__.update(attrs)

return obj

class PrototypeDispatcher:

def __init__(self):

self._objects = {}

def get_objects(self):

"""Get all objects"""

return 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 main():

dispatcher = PrototypeDispatcher()

prototype = Prototype()

d = prototype.clone()

a = prototype.clone(value='a-value', category='a')

b = prototype.clone(value='b-value', is_checked=True)

dispatcher.register_object('objecta', a)

dispatcher.register_object('objectb', b)

dispatcher.register_object('default', d)

print([{n: p.value} for n, p in dispatcher.get_objects().items()])

if __name__ == '__main__':

main()

### OUTPUT ###

# [{'objectb': 'b-value'}, {'default': 'default'}, {'objecta': 'a-value'}]