(self, on_change)
Enable notification of changes for this characteristic on the
        specified on_change callback.  on_change should be a function that takes
        one parameter which is the value (as a string of bytes) of the changed
        characteristic value.
Enable notification of changes for this characteristic on the
        specified on_change callback.  on_change should be a function that takes
        one parameter which is the value (as a string of bytes) of the changed
        characteristic value.
Enable notification of changes for this characteristic on the specified on_change callback . on_change should be a function that takes one parameter which is the value ( as a string of bytes ) of the changed characteristic value .
def start_notify(self, on_change):
        """Enable notification of changes for this characteristic on the
        specified on_change callback.  on_change should be a function that takes
        one parameter which is the value (as a string of bytes) of the changed
        characteristic value.
        """
        raise NotImplementedError
def start_notify ( self , on_change ) : raise NotImplementedError