[Pyparsing] (no subject)

[Mario R. O. <nim...@gm...>]

Hello everyone. I'm new to python and even newer to pyparsing.
I pasted my code at http://pastebin.com/fS07CCZR
I'm having trouble with the definition of 'grant' at line 100 (the error
message is shown at the end of the paste).
Here is the ebnf of what i want:
<grant> ::= <> 'grant', <permission>, <user>, [',', <user>]0, <journal>,
[',', <journal>]0

Can someone please exlain me what am I doing wrong here?
TIA!