(self, optim=None, more_data=[])
abstract method, add a "data point" from the state of `optim` into the
        logger, the argument `optim` can be omitted if it was `register()`-ed before,
        acts like an event handler
abstract method, add a "data point" from the state of `optim` into the
        logger, the argument `optim` can be omitted if it was `register()`-ed before,
        acts like an event handler
abstract method add a data point from the state of optim into the logger the argument optim can be omitted if it was register () - ed before acts like an event handler
def add(self, optim=None, more_data=[]):
        """abstract method, add a "data point" from the state of `optim` into the
        logger, the argument `optim` can be omitted if it was `register()`-ed before,
        acts like an event handler"""
        raise NotImplementedError()
def add ( self , optim = None , more_data = [ ] ) : raise NotImplementedError ( )