[Pyparsing] empty lines and restOfLine comments

[Robert P. <rob...@gm...>]

Hello!
I am a(nother) Python and pyparsing newbie.
I want to use pyparsing-1.3 to parse files that look like the
following snippet, enclosed in triple quotes:
"""
/ Flux DSS-DESIGNER, Sample Data

/ Projekt: Set 1



// HYDRAULIK & QUERPROFIL-DATEN

floin_file          = set_1.floin

floab_file          = set_1.floab


floout_file         = floout

flores_file         = flores


// REGELUNG

ctrlin_file         = set_1.ctrlin

ctrlres_file        = ctrl_res

"""

Lines starting with a slash (comments) should be ignored.
I have been reading (either on this list or in the sf help forum - I
cannot find it right now) that empty lines can only be read using
grammar.parseString("".join(inputFile.readlines())), like in the
configParse.py example.
But when everything is joined like this, how can the end of the
comment lines be determined?

I am currently stuck at:
chars = alphanums + "_" + "." + "\\"
assignment = Word(chars) + "=" + Word(chars)
line = (assignment | restOfLine) + LineEnd
grammar = ZeroOrMore(line)

This does not even run through - I get
Traceback (most recent call last):
  File "parseCfg.py", line 6, in ?
    line = (assignment | restOfLine) + LineEnd
  File "/usr/lib/python2.3/site-packages/pyparsing.py", line 635, in __add__
    return And( [ self, other ] )
  File "/usr/lib/python2.3/site-packages/pyparsing.py", line 1306, in __init__
    if not e.mayReturnEmpty:
AttributeError: type object 'LineEnd' has no attribute 'mayReturnEmpty'

When I just use "line = assignment | restOfLine" instead, the parser
runs into an infinite loop on the snippet above, with or without the
"join readlines" trick.

Thank you for any help,

Robert

Btw, how can I use a pyparsing.Dict here to get direct access e.g. to
myParseResult['floin_file']?