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Code: Alles auswählen

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


class Schalter(object):
	status = False
	
	def __init__(self, name=u"Schalter"):
		self.name = name

	def __str__(self):
		return u"%s ist %s!" % (self.name, "an" if self.status else "aus")

	
def main():
	s1 = Schalter(u"s1")
	print s1
	s2 = Schalter(u"s2")
	s2.status = True
	print s2
	print s1
	Schalter.status = True
	print s1, s2


if __name__ == "__main__":
	main()

Code: Alles auswählen

class Switch(object):
    def __init__(self, state=False, master=None):
        self._state = state
        self.master = master
    
    def __str__(self):
        return 'Switch (%s)' % ('off', 'on ')[self.state]
    
    @apply
    def state():
        def fget(self):
            result = self._state
            if self.master is not None:
                result = result and self.master.state
            return result
        def fset(self, state):
            self._state = state
        return property(**locals())


def main():
    master = Switch(True)
    room_a = Switch(master=master)
    room_b = Switch(master=master)
    room_a.state = True
    print master, room_a, room_b
    master.state = False
    print master, room_a, room_b

Code: Alles auswählen

import time
class Switch(object):
    def __init__(self, state=False, master=None):
        self.state = state
        self._master = master

    def __str__(self):
        return "Switch (%s)" % ['Off', 'On'][self.state]

    def set_state(self, state):
        self._state = state
        self.state_change = time.time()

    def get_state(self):
        if self._master and (self._master.state_change > self.state_change):
            self._state = self._master.state
        return self._state

    state = property(get_state, set_state)


def main():
    master = Switch()
    s1 = Switch(master=master)
    s2 = Switch(master=master)
    print master.state, s1.state, s2.state
    s1.state = True
    print master.state, s1.state, s2.state
    master.state = False
    print master.state, s1.state, s2.state
    master.state = True
    print master.state, s1.state, s2.state

if __name__ == '__main__':
    main()