ImportError: cannot import name 'get_num_classes' from 'torchmetrics.utilities.data'

[Schnei1811]

Getting the following error following the instructions

python scripts/txt2img.py --prompt "a virus monster is playing guitar, oil on canvas" --ddim_eta 0.0 --n_samples 4 --n_iter 4 --scale 5.0 --ddim_steps 50
Traceback (most recent call last):
File "scripts/txt2img.py", line 11, in
from pytorch_lightning import seed_everything
File "usr\anaconda3\envs\ldm\lib\site-packages\pytorch_lightning_init_.py", line 20, in
from pytorch_lightning import metrics # noqa: E402
File "usr\anaconda3\envs\ldm\lib\site-packages\pytorch_lightning\metrics_init_.py", line 15, in
from pytorch_lightning.metrics.classification import ( # noqa: F401
File "usr\anaconda3\envs\ldm\lib\site-packages\pytorch_lightning\metrics\classification_init_.py", line 14, in
from pytorch_lightning.metrics.classification.accuracy import Accuracy # noqa: F401
File "usr\anaconda3\envs\ldm\lib\site-packages\pytorch_lightning\metrics\classification\accuracy.py", line 18, in
from pytorch_lightning.metrics.utils import deprecated_metrics, void
File "usr\anaconda3\envs\ldm\lib\site-packages\pytorch_lightning\metrics\utils.py", line 22, in
from torchmetrics.utilities.data import get_num_classes as _get_num_classes
ImportError: cannot import name 'get_num_classes' from 'torchmetrics.utilities.data' (usr\anaconda3\envs\ldm\lib\site-packages\torchmetrics\utilities\data.py)

[Tariq195]

conda uninstall torchmetrics
conda install torchmetrics=0.5

[micahsgilbert]

Got an error doing just conda install torchmetrics=0.5.
According to https://anaconda.org/conda-forge/torchmetrics the correct command is:
conda install -c conda-forge torchmetrics=0.5

[sixtyspam]

torchmetrics 0.7 worked for me, had same problem

pip uninstall torchmetrics
pip install torchmetrics==0.7

Don't forget to activate conda environment in case you're using conda