[python-users] Pyparsing

[hunniger]

Hallo,
Ich habe mich vor ein paar Monaten schon mal mit pyparsing versucht, war 
damals aber nicht sehr erfolgreich. Vieleicht kann mir ja der Mensch der 
den Pyparsing Vortrag gehalten hat weiter helfen. Siehe unten.
Gruß Dirk


I am trying to get started with the pyparing. I am working on a programm 
that read files in the mediawiki format and write files in the latex 
format. I currently have got a problem with the "|" character since it 
is used as a seperator inside an intrawikilink as well as a seperator 
for cells in a table, which naturaly causes problems with tables which 
contain intrawikilinks. As far as I found out pyparsing is able to solve 
this problem in a good way.
So I tryed to write a grammer for a wikilink, which is given in the 
attached file. There is a problem with the asXML function. You may look 
at the output when you run the program comparing it with the multiline 
docstring given in the sourcecode. Essetially I would have expected the 
output to be similar to the docstring. But it is much different. 
Pyparsing writes a list like structure and I expected a tree like 
structure. I often heard the term parse tree. So how is it possible to 
access the parse tree that pypasing creates. The list view of the 
parsetree does not seem to be useful for my problem. The second problem 
I have is that I want to run pyparsing on a unicode file that I open 
with codecs.open("text","r","utf8"). So there are very many possible 
characters that I do not want to list in my sourcecode. So how can I 
write down a grammer expression that machtes a series of arbitrary 
characters, which does not include certain specifically mentioned 
charactes.
Cheers Dirk