[Pyparsing] delimitedList Results

[Loïc B. <lo...@li...>]

	Hi,

I have some questions on how to use properly parseResults associated with a 
delimitedList.

Here is the kind of line I would like to parse :

[code]
string = 'line 22 width=2;type=1 V101-,V103,V99+,V12 L102'
[/code]

And here is the parser I've built to extract information from this string:

[code]
import pyparsing as p


integer = p.Word(p.nums)
name    = p.Word(p.alphas, p.alphanums+'_')
ident   = p.Combine(name('id') + p.Optional(p.oneOf('- +')))

lineParser = (   'line'    + integer('num')
               + 'width='  + integer('width')+';'
               + 'type='   + integer('type')
               + p.delimitedList(ident)('points')
               + name('name')
                         )

r = lineParser.parseString(string)
[/code]

I can access to simple keys :

>>> print r.name
L102

but with delimitedList, it seems to be a bit more trickier as the associated 
parseResults can not be used as a list of ParseResults but rather as a list of 
strings:

>>> for pt in r.points:
>>>     print type(pt), pt
   <type 'str'> V101-
   <type 'str'> V103
   <type 'str'> V99+
   <type 'str'> V12

I can get the list of point directly with r.points.asList(), but I don't know 
how to access to the list of ids.

I was expecting that I could use classical __getitem__ method to list all ids 
with something like [ pt.id for pt in r.points]
Is there any way to do this ?

Besides, I don't fully understand the structure of this parseResult :

>>> print repr(r.points)
(['V101-', 'V103', 'V99+', 'V12'], {'id': [('V101', 0), ('V103', 1), ('V99', 
2), ('V12', 3)]})
 
it seems that the id key is associated with the list that I m looking for, but 
when I try to retrieve it I only get one element of that list:

>>> r.points.id
V12

Have you got any clue?


Regards
-- 
Loïc