code: def strip_and_uniq(tab):
      
      _list = []
      for elt in tab:
          val = elt.strip()
          if val and val not in _list:
              _list.append(val)
      return _list
docs: Strip every element of a list and keep a list of ordered unique values
  
      :param tab: list to strip
      :type tab: list
      :return: stripped list with unique values
      :rtype: list