Unable to unpickle a MatthewsCorrCoef saved object

[okbalefthanded]

🐛 Bug

Matthews Correlation coefficient requires a positional argument num_classes, so it raises a TypeError:
missing 1 required positional argument: 'num_classes'

To Reproduce

Steps to reproduce the behavior...

The error is reported in this colab notebook :
https://colab.research.google.com/drive/1UvhPyPbzpF61SY-51ti8R_O-Vc2FP-vO?usp=sharing

Expected behavior

We expect the same behaviour as in v 0.9.3.

Environment

• TorchMetrics version : 0.10.0, installed using pip
• Python & PyTorch Version: 3.7.14, 1.12.1+cu113
• google Colab

[github-actions]

Hi! thanks for your contribution!, great first issue!

[stancld]

@SkafteNicki

[SkafteNicki]

Hi @okbalefthanded, thanks for raising this issue.
Happy to report that it has already been solve in PR #1250. To fix the issue you can upgrade to master for now:

pip install https://github.com/Lightning-AI/metrics/archive/master.zip

or wait until the next bugfix release.
Closing issue.