!14 config ckpt path

Merge pull request !14 from wukesong/modify-lenet

chapter03/lenet/main.py

@@ -94,15 +94,15 @@ if __name__ == "__main__":
     net_loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True, reduction="mean")
     repeat_size = 1
     net_opt = nn.Momentum(network.trainable_params(), cfg.lr, cfg.momentum)
-    config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
-                                 keep_checkpoint_max=cfg.keep_checkpoint_max)
-    ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet", config=config_ck)
     model = Model(network, net_loss, net_opt, metrics={"Accuracy": Accuracy()})
 
     if args.mode == 'train':  # train
         ds_train = create_dataset(os.path.join(args.data_path, args.mode), batch_size=cfg.batch_size,
                                   repeat_size=repeat_size)
         print("============== Starting Training ==============")
+        config_ck = CheckpointConfig(save_checkpoint_steps=cfg.save_checkpoint_steps,
+                                     keep_checkpoint_max=cfg.keep_checkpoint_max)
+        ckpoint_cb = ModelCheckpoint(prefix="checkpoint_lenet", config=config_ck, directory=args.ckpt_path)
         model.train(cfg['epoch_size'], ds_train, callbacks=[ckpoint_cb, LossMonitor()],
                     dataset_sink_mode=args.dataset_sink_mode)
     elif args.mode == 'test':  # test