def on_batch_begin(self, train, **kwargs):
        "Multiply the current lr if necessary."
        if not self.learn.gan_trainer.gen_mode and train: self.learn.opt.lr *= self.mult_lr
def on_batch_begin ( self , train , ** kwargs ) : if not self . learn . gan_trainer . gen_mode and train : self . learn . opt . lr *= self . mult_lr
Multiply the current lr if necessary.