Re: [Pyparsing] multiple tokens but no repeats

[W. M. B. <de...@de...>]

On Tue, Nov 20, 2007 at 03:24:34PM +0000, Tim Grove wrote:
> I'm trying to represent the logic that I wish to match 0 or more tokens, 
> up to a maximum of 4 tokens, but I don't want any repeats of tokens 
> already matched within the group of 4. How could I do that?

I would try setParseAction(), i.e. match 0 to 4 tokens and check
myself for duplication.