Callback Properties in Python
Project description
echo: Callback Properties in Python
Echo is a small library for attaching callback functions to property state changes. For example:
class Switch(object): state = CallbackProperty('off') def report_change(state): print 'the switch is %s' % state s = Switch() add_callback(s, 'state', report_change) s.state = 'on' # prints 'the switch is on'
CalllbackProperties can also be built using decorators
class Switch(object): @callback_property def state(self): return self._state @state.setter def state(self, value): if value not in ['on', 'off']: raise ValueError("invalid setting") self._state = value
Full documentation is avilable here
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