agregator.py
def on(self, on_off):
        """
        Setter for parameter on/off
        :param on_off: define if the device must work or not
        """
        self._on = on_off

        Setter for parameter on/off
        :param on_off: define if the device must work or not
        
Setter for parameter on/off
Setter for parameter on / off
def on(self, on_off):
        self._on = on_off
def on ( self , on_off ) : self . _on = on_off
Setter for parameter on/off
Setter for parameter on / off
"""
        Setter for parameter on/off
        :param on_off: define if the device must work or not
        """
self
on_off
define if the device must work or not
define if the device must work or not