The validating log does not remain in the console.

[Keiku]

The validating log does not remain in the console. How can I print and display it?

The current validation_step is as follows.

    def validation_step(self, batch, batch_nb):
        loss, accuracy = self.forward(batch)
        self.log("loss/val", loss)
        self.log("acc/val", accuracy)
        return loss

It will be displayed for a moment as shown below, but it will not remain as a log.

Global seed set to 0
GPU available: True, used: True
TPU available: None, using: 0 TPU cores
LOCAL_RANK: 0 - CUDA_VISIBLE_DEVICES: [0]
Files already downloaded and verified
Files already downloaded and verified
Epoch 26:  98%|███████████████▋| 114/116 [00:25<00:00,  4.50it/s, loss=0.623, v_num=0]
Validating: 100%|█████████████████████████████████████| 19/19 [00:01<00:00, 18.68it/s]

Global seed set to 0
GPU available: True, used: True
TPU available: None, using: 0 TPU cores
LOCAL_RANK: 0 - CUDA_VISIBLE_DEVICES: [0]
Files already downloaded and verified
Files already downloaded and verified
Epoch 28:   3%|▌                 | 4/116 [00:01<00:42,  2.62it/s, loss=0.588, v_num=0]

[awaelchli]

Yes that's correct, it's a UI design choice.
If you wish to see your values in the progress bar, you can log with self.log("loss/val", loss, prog_bar=True) and it will show up in the main bar.

[tchaton]

Hey @Keiku,

As shared by @awaelchli, this would print to the progress bar.
Learn more with this section of the doc: https://pytorch-lightning.readthedocs.io/en/latest/extensions/logging.html#logging-from-a-lightningmodule

Best,
T.C

[Keiku]

It wasn't the answer I expected, but I found that it didn't log by default. I will consider if I can implement a custom logger.