code: def read_file(filename):
      with PathManager.open(filename) as f:
          lines = [x for x in f.readlines()]
      return lines
  
file_path: ParlAI/parlai/tasks/ms_marco/build.py
imports: import gzip
  import json
  import os
  import tqdm
  import parlai.core.build_data
  from parlai.utils.io import PathManager
  from parlai.core.build_data import DownloadableFile
label_desc: Use image node_id 1 for calling a global function with example usage: read_file(filename) and returns: lines