AttributeError: type object 'Trainer' has no attribute 'add_argparse_args'

[Park-yebin]

Bug description

When trying to run

parser = argparse.ArgumentParser()
parser = Trainer.add_argparse_args(parser)
args = parser.parse_args([])

AttributeError: type object 'Trainer' has no attribute 'add_argparse_args'
That error message appears.

What version are you seeing the problem on?

v2.0, v2.1, v2.2

How to reproduce the bug

import argparse
import pytorch_lightning
from pytorch_lightning.trainer import Trainer
from pytorch_lightning.callbacks import ModelCheckpoint, Callback, LearningRateMonitor

parser = argparse.ArgumentParser()
parser.add_argument(
        "--gpus",
        type=int,
        default=1,
        help="num of gpus to use",
)
parser = Trainer.add_argparse_args(parser)
args = parser.parse_args()

AttributeError: type object 'Trainer' has no attribute 'add_argparse_args'

#- Lightning Component (e.g. Trainer, LightningModule, LightningApp, LightningWork, LightningFlow): Trainer
#- PyTorch Lightning Version (e.g., 1.5.0): 2.0.0
#- Lightning App Version (e.g., 0.5.2):
#- PyTorch Version (e.g., 2.0): 2.0.1
#- Python version (e.g., 3.9): 3.8.8
#- OS (e.g., Linux): Linux
#- CUDA/cuDNN version: 12.0
#- GPU models and configuration:
#- How you installed Lightning(conda, pip, source): conda install pytorch-lightning=2.0.0 -c conda-forge
#- Running environment of LightningApp (e.g. local, cloud):

More info

When I first encountered the error, I thought it might be a version conflict issue between internal programs, so I installed 'pytorch_lightning' anew by referring to the link('https://lightning.ai/docs/pytorch/stable/versioning.html').
I finished reinstalling, but that didn't solve the problem. What's the problem?
(At first, I've installed ver 2.2 then, I convert to 2.0. For test I've done the same thing at ver 2.1)

[awaelchli]

Hi
The method removed in 2.0, so the AttributeError is expected.
The change is documented in the migration guide.
In the release notes, we give some more details for the reason of the change (section "The brittle argument parsing utilities").