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python-patterns/borg.py at master · jhreact/python-patterns · GitHub

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#!/usr/bin/env python

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

class Borg:

__shared_state = {}

def __init__(self):

self.__dict__ = self.__shared_state

self.state = 'Init'

def __str__(self):

return self.state

class YourBorg(Borg):

pass

if __name__ == '__main__':

rm1 = Borg()

rm2 = Borg()

rm1.state = 'Idle'

rm2.state = 'Running'

print('rm1: {0}'.format(rm1))

print('rm2: {0}'.format(rm2))

rm2.state = 'Zombie'

print('rm1: {0}'.format(rm1))

print('rm2: {0}'.format(rm2))

print('rm1 id: {0}'.format(id(rm1)))

print('rm2 id: {0}'.format(id(rm2)))

rm3 = YourBorg()

print('rm1: {0}'.format(rm1))

print('rm2: {0}'.format(rm2))

print('rm3: {0}'.format(rm3))

### OUTPUT ###

# rm1: Running

# rm2: Running

# rm1: Zombie

# rm2: Zombie

# rm1 id: 140732837899224

# rm2 id: 140732837899296

# rm1: Init

# rm2: Init

# rm3: Init

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