Pyparsing: Grammar Suggestion

Paul McGuire ptmcg at
Wed May 17 20:57:11 CEST 2006

"Khoa Nguyen" < at> wrote in message
news:mailman.5825.1147888678.27775.python-list at
> Thanks for your reply. This looks promising, but I have a few more
> 1. If f(i) is non-terminal (e.g f(i) is another grammar expression),
> how would I adapt your idea to a more generic way?
> 2. The field delimiter is not always ',' in my case. So I guess I'll
> have to use delimtedList instead?
> Thanks again,
> Khoa


Yes, it sounds like delimitedList is the way to go.  Note that the delimiter
for delimitedList can also be an expression, it does not have to be a
literal string, or terminal.  Also, do not bother using delimitedList if
your delimiter is just whitespace - pyparsing breaks up tokens on whitespace
by default, that is:


will correctly parse "This is a sentence made up of alphabetic words",

['This', 'is', 'a', 'sentence', 'made', 'up', 'of', 'alphabetic', 'words']

without having to represent the delimiting whitespace in the grammar.

-- Paul

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