code: def scorer_function(images, prompts, metadata):
      return torch.randn(1) * 3.0, {}
  
file_path: trl/tests/test_ddpo_trainer.py
imports: import gc
  import unittest
  import torch
  from trl import is_diffusers_available, is_peft_available
  from .testing_utils import require_diffusers
label_desc: Use image node_id 1 for calling a global function with example usage: scorer_function(images, prompts, metadata) and returns: unknown,  dict