prerfix for metric names the `LearningRateMonitor`

[mazurkin]

Description & Motivation

It would be really nice to have some prefix parameter for all the metric names there.

So I could group them later by their prefix.

Pitch

No response

Alternatives

No response

Additional context

No response

cc @lantiga

[mazurkin]

this the workaround I made:

class LearningRatePrefixMonitor(pl.callbacks.LearningRateMonitor):
    """Learning rate monitor that adds a custom prefix to logged metric names.

    Extends Lightning's LearningRateMonitor to prepend a configurable prefix
    to all learning rate metric names, enabling cleaner grouping in TensorBoard
    and Wandb dashboards.

    Args:
        prefix: String to prepend to learning rate metric names, or None to keep default names.
    """

    def __init__(self, *args, prefix: str | None = None, **kwargs) -> None:
        super().__init__(*args, **kwargs)

        self.prefix = prefix

    def _add_prefix(self, *args, **kwargs) -> str:
        name: str = super()._add_prefix(*args, **kwargs)

        if self.prefix is not None:
            return self.prefix + name
        else:
            return name

[justusschock]

Hey @mazurkin , i think that's a reasonable thing to add. Would you be interested in submitting a PR for this?