code: def __repr__(self):
      return (
          "{name}(stats_file={stats_file}, "
          "norm_means={norm_means}, norm_vars={norm_vars}, "
          "reverse={reverse})".format(
              name=self.__class__.__name__,
              stats_file=self.stats_file,
              norm_means=self.norm_means,
              norm_vars=self.norm_vars,
              reverse=self.reverse,
          )
      )
  
file_path: espnet/espnet/transform/cmvn.py
imports: import io
  import h5py
  import kaldiio
  import numpy
label_desc: Use image node_id 2 for calling the CMVN obj's underlying member method code with example usage: obj.__repr__() and returns: str