Basic ProgressBar does not work

[dnaihao]

Bug description

Version of pytorch_lightning==2.0.6, tqdm==4.65.0
I want to display the training progress of my models and the basic ProgressBar from pytorch_lightning.callbacks does not work (nothing shows up).
However, when I switched to RichProgressBar, the rich progress bar shows up.

What version are you seeing the problem on?

v2.0

How to reproduce the bug

python pytorch_lightning.callbacks import ProgressBar does not show up anything.

from pytorch_lightning.callbacks import RichProgressBar can show the training progress.

Error messages and logs

Nothing shows up for ProgressBar.

Environment

pytorch_lightning==2.0.6
tqdm==4.65.0

More info

Running things in a Linux environment, with an A40 GPU.

cc @awaelchli

[awaelchli]

Hi @dnaihao

You don't need to import the progress bar if you want to use tqdm. It gets enabled by default if you just run the Trainer :)
The reason why you don't see anything is because you accidentally imported the base class, but you probably wanted to import pytorch_lightning.callbacks import TQDMProgressBar. (But again, it is the default, so it's not necessary technically).

Let me know if that resolves your problem :)

[dnaihao]

Thanks for the explanation.
But for the previous versions of Pytorch Lightening (probably around 1.6.X), I imported ProgressBar and it worked out perfectly fine.
But sure, I am using the TODMProgressBar now and it works fine.

[awaelchli]

Yes, you are right, in previous versions prior to 2.0, ProgressBar was the tqdm-version. Later, the name of the base class was changed from ProgressBarBase to just ProgressBar #17058. Apologies if this caused confusion!