how to print loss every n steps without progress bar

[sun-peach]

Hi, I am new to PL. I would like to print loss every n steps (or per epoch) without display progress bar. Now I just disable the progress bar, but I find nothing printed out, including the loss. I see my code has something like self.log('val_loss', reduced_loss, prog_bar=False, logger=True, on_step=False, on_epoch=True, sync_dist=True), but cannot find where the log is. I just set Trainer(logger=True). How can I get the log printed to console or some file?

Thank you very much!

[SkafteNicki]

If you can live with stuff getting logged into a file, I highly recommend that you use the CSVLogger:

from pytorch_lightning.loggers import CSVLogger
logdir = os.getcwd() # this sets very the file will be stored
trainer = Trainer(logger=CSVLogger(logdir))

this will create a metrics.csv file in folder default/version_0 which will be updated as training progresses.