AttributeError: module ‘torchmetrics’ has no attribute ‘IoU’

I’m newbie so be kind to me please.

self.metrics = torchmetrics.IoU(num_classes=n_classes)

I don’t know how to use jaccard.

from torchmetrics import JaccardIndex    
self.metrics = JaccardIndex(task='multiclass',num_classes=n_classes)