(self, value)
return self
Add new listeners and update them about the state.
Add new listeners and update them about the state.
Add new listeners and update them about the state .
def __iadd__(self, value):
    """Add new listeners and update them about the state."""
    listeners = to_iterable(value)
    super().__iadd__(listeners)
    for listener in listeners:
      listener(self._value)
    return self
def __iadd__ ( self , value ) : listeners = to_iterable ( value ) super ( ) . __iadd__ ( listeners ) for listener in listeners : listener ( self . _value ) return self