i want to ask question about dice.py

[1583364217]

average:
Defines the reduction that is applied. Should be one of the following:
- 'micro' [default]: Calculate the metric globally, across all samples and classes.
- 'macro': Calculate the metric for each class separately, and average the
metrics across classes (with equal weights for each class).
- 'weighted': Calculate the metric for each class separately, and average the
metrics across classes, weighting each class by its support (tp + fn).
- 'none' or None: Calculate the metric for each class separately, and return
the metric for every class.
- 'samples': Calculate the metric for each sample, and average the metrics
across samples (with equal weights for each sample).
.. note::
What is considered a sample in the multi-dimensional multi-class case
depends on the value of mdmc_average.

   if average not in ["micro", "macro", "samples"]:
            raise ValueError(f"The `reduce` {average} is not valid.")

i used None to get a list including all classes dice, but raise a error. In the exegesis, You can pass in the parameter None. how i to do to get each classes dice? rewrite Dice?