code: def _build_gecos(gecos_dict):
      '''
      Accepts a dictionary entry containing GECOS field names and their values,
      and returns a full GECOS comment string, to be used with usermod.
      '''
      return '{0},{1},{2},{3}'.format(gecos_dict.get('fullname', ''),
                                      gecos_dict.get('roomnumber', ''),
                                      gecos_dict.get('workphone', ''),
                                      gecos_dict.get('homephone', '')f _build_gecos(gecos_dict):
      '''
      Accepts a dictionary entry containing GECOS field names and their values,
      and returns a full GECOS comment string, to be used with usermod.
      '''
      return '{0},{1},{2},{3}'.format(gecos_dict.get('fullname', ''),
                                      gecos_dict.get('roomnumber', ''),
                                      gecos_dict.get('workphone', ''),
                                      gecos_dict.get('homephone', ''))
docs: Accepts a dictionary entry containing GECOS field names and their values,
      and returns a full GECOS comment string, to be used with usermod.