code: def dictlist_convert_to_int(dict_list: Iterable[Dict], key: str) -> None:
      
      for d in dict_list:
          try:
              d[key] = int(d[key])
          except ValueError:
              d[key] = None
docs: Process an iterable of dictionaries. For each dictionary ``d``, convert
      (in place) ``d[key]`` to an integer. If that fails, convert it to ``None``.