code: def _time_to_str(time_idx):
      time_idx = time_idx * 10**4
      return "%06d" % time_idx
  
file_path: espnet/egs2/dns_icassp21/enh1/pyscripts/audio/trim_silence.py
imports: import argparse
  import codecs
  import logging
  import os
  import kaldiio
  import librosa
  import matplotlib.pyplot
  import numpy
  import resampy
  from espnet.utils.cli_utils import get_commandline_args
label_desc: Use image node_id 1 for calling a global function with example usage: _time_to_str(time_idx) and returns: unknown