Module pbt 

Population-Based Training runner.

PBT is a cyclic evolutionary process where each generation:

1. Train: each population member trains for N steps
2. Evaluate: each member is evaluated to produce a fitness score
3. Exploit/Explore: underperformers copy top performers, then mutate hyperparameters

Each generation’s training phase uses the existing sampler infrastructure.

Structs

FnPbtExecutor

Function-based PBT executor for convenience.

PbtConfig

Configuration for a PBT run.

PbtRunner

Orchestrates the PBT evolutionary cycle.

PopulationMember

A single member of the population.

Traits

PbtExecutor

Trait for the training + evaluation callback.