class_docstr: Meta data for a kaldi corpus directory. 
class_docstr_tok: ["Meta","data","for","a","kaldi","corpus","directory","."]
docstr: spk to id list 
docstr_tok: ["spk","to","id","list"]
code: def spk2id(self):
      """spk to id list"""
      return {s[0]: s[1].id for s in self.spks.items()}
  
file_path: delta/delta/utils/kaldi/kaldi_dir.py
imports: import os
  from collections import defaultdict
  from absl import logging
label_desc: Use image node_id 2 for calling the KaldiMetaData obj's underlying member method code with example usage: obj.spk2id() and returns: unknown