code: def build(opt):
      version = "0.2"
      dpath = os.path.join(opt["datapath"], "ConvAI2_wild_evaluation")
  
      if not build_data.built(dpath, version):
          print("[building data: " + dpath + "]")
  
          if build_data.built(dpath):
              # An older version exists, so remove these outdated files.
              build_data.remove_dir(dpath)
          build_data.make_dir(dpath)
  
          # Download the data.
          for downloadable_file in RESOURCES:
              downloadable_file.download_file(dpath)
  
          output_fname = "convai2_wild_evaluation.json"
          output_path = os.path.join(dpath, output_fname)
  
          with PathManager.open(output_path, "r") as data_f:
              data = json.load(data_f)
  
          make_parlai_format(data, dpath)
          PathManager.rm(output_path)
  
          # Mark the data as built.
          build_data.mark_done(dpath, version)
  
imports: import os
  import json
  from parlai.core.build_data import DownloadableFile
  from parlai.utils.io import PathManager
  import parlai.core.build_data
label_desc: Use image node_id 2 for calling a global function with example usage: build(opt) without return types