Decorators

Register a class or function as a feature.

The decorated class must be a subclass of the BaseFeature protocol, or a decorated function will be automatically wrapped as a BaseFeature subclass.

Parameters:

• _cls (type[T], default: None ) –

  The class to be decorated. If None, returns a decorator function.

• feature_id (str | None, default: None ) –

  Set a custom ID for the feature. If not provided, the ID will be generated automatically from the module and class/function name. It's recommended to not set this parameter.

• feature_registry ((Registry[BaseFeature], injected), default: Provide[feature_registry] ) –

  The registry where the feature will be registered. Injected by dependency container.

Returns:

• Callable[[type[T]], type[T]] | type[T] –

  Either the decorated class/function or a decorator function.

Examples:

Decorate a class as a feature:

>>> from luna_bench.base_components import BaseFeature
>>> from luna_model import Model
>>> from pydantic import BaseModel
>>>
>>> @feature
... class MyFeature(BaseFeature):
...     def run(self, model: Model) -> BaseModel:
...         # Extract and return feature data
...         return {"feature_value": 42}

Decorate a function as a feature:

>>> @feature
... def image_dimensions(model: Model) -> dict:
...     # Extract image dimensions from model
...     return {"width": 640, "height": 480}

Use a custom feature ID:

>>> @feature(feature_id="custom.image_dimensions")
... def image_dims(model: Model) -> dict:
...     return {"width": 640, "height": 480}

Register a class or function as an algorithm.

The decorated class must be a subclass of BaseAlgorithmSync or BaseAlgorithmAsync. When decorating a function, it is wrapped in a dynamic class and registered with the background task queue.

Register a class or function as a metric component.

This decorator handles both class-based metrics (inheriting from BaseMetric) and function-based metrics. When you decorate a function, it's automatically wrapped in a BaseMetric subclass. You can also declare feature dependencies that your metric needs to compute its result.

Parameters:

• _cls (type[BaseMetric[Any]] | Callable[[Solution, FeatureResultContainer], MetricResult | float | int] | list[type[BaseFeature[Any]]] | tuple[type[BaseFeature[Any]], ...] | type[BaseFeature[Any]] | None, default: None ) –

  The metric to register. Can be:

  • A class inheriting from BaseMetric (bare @metric)
  • A function taking (solution, feature_results) and returning float/int/MetricResult
  • A single BaseFeature type (becomes a dependency)
  • A list or tuple of BaseFeature types (dependencies)

  When dependencies are passed, the decorator returns a decorator function that expects a metric class or function as its argument. In mose cases you don't need to set this field at all.

• metric_id (str | None, default: None ) –

  Custom identifier for this metric in the registry. If omitted, an ID is auto-generated from the module and class/function name.

• metric_registry (Registry[BaseMetric], default: Provide[metric_registry] ) –

  The registry where this metric will be stored. Injected by the container. You do not need to set it.

Returns:

• type[T] | type[BaseMetric[MetricResult]] | Callable –

  The registered metric class, or a decorator if dependencies were specified.

Examples:

Basic metric from a class:

>>> from luna_bench.base_components import BaseMetric
>>> from luna_model import Solution
>>> from luna_bench.base_components.data_types.feature_results import FeatureResults
>>> from luna_bench.types import MetricResult
>>>
>>> @metric
... class SolutionQuality(BaseMetric):
...     def run(self, solution: Solution, feature_results: FeatureResults) -> MetricResult:
...         ...
...         return MetricResult(result=26.11)

Basic metric from a function:

>>> @metric
... def solve_time(solution: Solution, feature_results: FeatureResultContainer) -> float:
...     return 26.11

Metric that depends on a feature:

>>> from luna_bench.base_components import BaseFeature
>>>
>>> @metric(Feature1)
... def feature_based_metric(solution: Solution, feature_results: FeatureResultContainer) -> float:
...     return 26.11

Metric depending on multiple features:

>>> @metric([Feature1, Feature2])
... def multi_feature_metric(solution: Solution, feature_results: FeatureResultContainer) -> float:
...     return 26.11

Register a class or function as a plot component.

This decorator registers visualization components that consume benchmark results. You can register a class inheriting from BasePlot or wrap a function that handles the plotting logic. Plots can declare dependencies on specific metrics or features they need to function.

Parameters:

• required_components (type[BasePlot] | Callable[[BenchmarkResultContainer], None] | list[type[_REQUIRED_TYPES]] | tuple[type[_REQUIRED_TYPES], ...] | type[_REQUIRED_TYPES] | None, default: None ) –

  The plot to register or its dependencies. Can be:

  • A class inheriting from BasePlot (bare @plot)
  • A function taking benchmark_results and returning None
  • A single BaseMetric or BaseFeature type (becomes a dependency)
  • A list or tuple of BaseMetric and/or BaseFeature types (dependencies)

  When dependencies are passed, the decorator returns a decorator function that expects a plot class or function as its argument.

• plot_id (str | None, default: None ) –

  Custom identifier for this plot in the registry. If omitted, an ID is auto-generated from the module and class/function name.

• plot_registry (Registry[BasePlot], default: Provide[plot_registry] ) –

  The registry where this plot will be stored. Injected by the container. You do not need to set it.

Returns:

• type[BasePlot] | Callable –

  The registered plot class, or a decorator if dependencies were specified.

Examples:

Basic plot from a class:

>>> from luna_bench.custom import BasePlot, BenchmarkResults
>>>
>>> @plot
... class MyPlot(BasePlot):
...     def run(self, benchmark_results: BenchmarkResults) -> None:
...         # Plot or visualization the data

Basic plot from a function:

>>> @plot
... def quick_plot(benchmark_results: BenchmarkResultContainer) -> None:
...      # Plot or visualization the data

Plot that depends on a specific metric:

>>> from luna_bench.metrics import Runtime
>>>
>>> @plot(Runtime)
... class RuntimeVisualization(BasePlot):
...     def run(self, benchmark_results: BenchmarkResultContainer) -> None:
...         # Plot or visualization the data

Plot that depends on multiple metrics:

>>> @plot([Runtime, Feasibility])
... class ComparisonPlot(BasePlot):
...     def run(self, benchmark_results: BenchmarkResultContainer) -> None:
...         # Render side-by-side comparison