callbacks.py 文件源码

def __init__(self, monitor='val_loss', cut_ratio=0.5, patience=2, scheduled_start_epoch=1, scheduled_cut_ratio=1.):
        """
        Args:
            monitor: quantity to be monitored.
            cut_ratio: cut the learning rate by this percent.
            patience: number of epochs with no improvement
                after which training will be stopped.
            scheduled_start_epoch: from which epoch to do scheduled learning rate discount
            scheduled_cut_ratio: learning rate discount ratio.
        """
        super(Callback, self).__init__()
        self.monitor = monitor
        self.patience = patience
        self.best = np.Inf
        self.wait = 0
        self.cut_ratio = cut_ratio
        self.monitor_decrease = False
        self.scheduled_start_epoch = scheduled_start_epoch
        self.scheduled_cut_ratio = scheduled_cut_ratio