code: def show_some(items:Collection, n_max:int=5, sep:str=','):
      "Return the representation of the first  `n_max` elements in `items`."
      if items is None or len(items) == 0: return ''
      res = sep.join([f'{o}' for o in items[:n_max]])
      if len(items) > n_max: res += '...'
      return ref show_some(items:Collection, n_max:int=5, sep:str=','):
      "Return the representation of the first  `n_max` elements in `items`."
      if items is None or len(items) == 0: return ''
      res = sep.join([f'{o}' for o in items[:n_max]])
      if len(items) > n_max: res += '...'
      return res
docs: Return the representation of the first  `n_max` elements in `items`.