code: def read_vest_pickle(gname, score_dir):
      
      vest_path = os.path.join(score_dir, gname+".vest.pickle")
      if os.path.exists(vest_path):
          if sys.version_info < (3,):
              with open(vest_path) as handle:
                  gene_vest = pickle.load(handle)
          else:
              with open(vest_path, 'rb') as handle:
                  gene_vest = pickle.load(handle, encoding='latin-1')
          return gene_vest
      else:
          return None
docs: Read in VEST scores for given gene.
  
      Parameters
      ----------
      gname : str
          name of gene
      score_dir : str
          directory containing vest scores
  
      Returns
      -------
      gene_vest : dict or None
          dict containing vest scores for gene. Returns None if not found.