class_docstr: Meta data for a kaldi corpus directory. 
class_docstr_tok: ["Meta","data","for","a","kaldi","corpus","directory","."]
docstr: Select utts and perform a shallow copy. 
docstr_tok: ["Select","utts","and","perform","a","shallow","copy","."]
code: def select_utts(self, utt_list):
      """Select utts and perform a shallow copy."""
      new_meta = KaldiMetaData()
      for utt_key in utt_list:
          new_meta.utts[utt_key] = self.utts[utt_key]
      new_meta.collect_spks_from_utts()
      return new_meta
  
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 6 for calling the KaldiMetaData obj's underlying member method code with example usage: obj.select_utts(utt_list) and returns: new_meta