code: def binlm2arpa(input_file, output_file, verbosity=2):
      
      cmd = ['binlm2arpa', '-binary', input_file,
                           '-arpa'. output_file]
      
      if verbosity:
          cmd.extend(['-verbosity', verbosity])
      
      # Ensure that every parameter is of type 'str'
      cmd = [str(x) for x in cmd]
  
      with tempfile.SpooledTemporaryFile() as output_f:
          with  output_to_debuglogger() as err_f:
              exitcode = subprocess.call(cmd, stdout=output_f, stderr=err_f)
          output = output_f.read()
      
      logger = logging.getLogger(__name__)
      logger.debug("Command '%s' returned with exit code '%d'." % (' '.join(cmd), exitcode))        
  
      if exitcode != 0:
          raise ConversionError("'%s' returned with non-zero exit status '%s'" % (cmd[0], exitcode))
  
      if sys.version_info >= (3,) and type(output) is bytes:
          output = output.decode('utf-8')
  
      return output.strip()
docs: Converts a binary format language model, as generated by idngram2lm, into an an ARPA format language model.