code: def convert_digits(
      input_number: int,
      num_digits: int,
  ):
      input_number_digits = len(str(input_number))
      assert input_number_digits <= num_digits
      output_digits = (num_digits - input_number_digits) * "0" + str(
          input_number
      )
  
      return output_digits
  
file_path: espnet/egs2/an4/asr1/pyscripts/text/make_text_scp.py
imports: import argparse
  import sys
  from mmap import mmap
  from pathlib import Path
  from espnet.utils.cli_utils import get_commandline_args
label_desc: Use image node_id 2 for calling a global function with example usage: convert_digits(input_number, num_digits) and returns: output_digits