code: def split_locale(locale: Text) -> Tuple[Text, Optional[Text]]:
      
  
      items = re.split(r'[_\-]', locale.lower(), 1)
  
      try:
          return items[0], items[1]
      except IndexError:
          return items[0], None
docs: Decompose the locale into a normalized tuple.
  
      The first item is the locale (as lowercase letters) while the second item
      is either the country as lower case either None if no country was supplied.