code: def not_one_of(these):
      
      ch = peek()
      desc = "not_one_of" + repr(these)
      try:
          if (ch is EndOfFile) or (ch in these):
              fail([desc])
      except TypeError:
          if ch != these:
              fail([desc])
      next()
      return ch
docs: Returns the current token if it is not found in the collection provided.
      
      The negative of one_of.