code: def construct_learner_name(fold, repeat, repeats):
      repeat_str = f"_repeat_{repeat}" if repeats > 1 else ""
      return f"learner_fold_{fold}{repeat_str}"
  
imports: import os
label_desc: Use image node_id 1 for calling a global function with example usage: construct_learner_name(fold, repeat, repeats) and returns: str, fold, repeat_str