Allow for using the same metrics with different parameters (e.g. Recall@10 + Recall@20)

[aurelien-clu]

Note: could be considered as a bug, if it is expected to already allow this behavior otherwise can be seen as a new feature (though a raised exception before the implementation could be useful)

Feature description

Allow to use several time the same metric with different parameters, e.g. Recall@10 + Recall@20.

Right now it does not work as the metric name does not take into account the parameters.

Metrics that could be updated:

• FBetaScoreMetric
• HammingScore
• PrecisionMetric
• RecallMetric
• TopKAccuracyMetric
• ... (may have missed some other)

Feature motivation

For simple use cases, deciding on the performance of a model with a single metric or different metrics is feasible. In my case I can accept to have a worse Recall@5 if the Recall@10 is much better. So I need to decide on both metrics.

(Optional) Suggest a Solution

Current:

FormatOptions::new(Self::NAME).unit("%").precision(2)

Potential solution:

FormatOptions::new(format!("{} ({:?})", Self::NAME, self.config)).unit("%").precision(2)

Config does not implement Debug so it probably should be added unless there are reasons not to.