Pyparsing...

[Raoul]

Larry,

This is an elegant little python! Thanks for you help. I am actually
trying to use pyparsing, not just in my project but as a learning
experience. I think pyparsing has a lot of potential.

I'm making progress but I am running into bugs with my pyparsing
grammar.

R-S

"Larry Bates" <lbates at swamisoft.com> wrote in message news:<A6SdnQwInMbf183cRVn-qQ at comcast.com>...
> Note: The Cellheader layout and the cell data
> layout don't appear to match properly (when
> compared to the data you show in your sample
> dictionary).  My solution follows the cellheader
> layout.
> 
> The format of your data file is perfect to be
> parsed with ConfigParser with [QC1] as section
> name and Type, NumberCells, etc. as options.
> 
> import ConfigParser
> 
> inputfilename='data.ini' # Insert input filename
> INI=ConfigParser.ConfigParser()
> INI.read(inputfilename)
> data={'type': None, 'numbercells': None, 'table':{}}
> 
> section='QC1'
> option='type'
> try: data['type']=INI.getint(section, option)
> except:
>     #
>     # Insert code to handle missing type option
>     #
>     pass
> 
> option='numbercells'
> try: data['numbercells']=INI.getint(section, option)
> except:
>     #
>     # Insert code to handle missing numbercells option
>     #
>     pass
> 
> option='cellheader'
> try: data['cellheader']=INI.get(section, option)
> except:
>     #
>     # Insert code to handle missing numbercells option
>     #
>     pass
> 
> CELLS=[x for x in INI.options(section)
>        if x.startswith('cell')]
> 
> #
> # Must get rid of 'cellheader' or maybe change the key name?
> #
> CELLS=[x for x in CELLS if x != 'cellheader']
> 
> celldatalist=[]
> for CELL in CELLS:
>     celldata={}
>     x, y, probe, plen, atom, index=INI.get(section, CELL).split(' ')
>     celldata['cell']=int(CELL[4:])
>     celldata['x']=int(x)
>     celldata['y']=int(y)
>     celldata['plen']=plen
>     celldata['atom']=int(atom)
>     celldata['index']=int(index)
>     celldatalist.append(celldata)
> 
> data['table']=celldatalist
> 
> 
> This is tested so it should be close (I do this quite a lot in
> my code).
> 
> You could wrap a loop around the outside of this if you have
> multiple QC instances.
> 
> Hope it helps.
> Larry Bates
> 
> 
> 
> "Raoul" <raoulsam at yahoo.com> wrote in message 
> news:7b22ae5b.0409201639.7837fca9 at posting.google.com...
> >I am futzing with pyparsing and for the most part enjoying it.
> > However, I'm running into trouble with whitespace delimited lists. I
> > get data in blocks like this:
> >
> > [QC1]
> > Type=15
> > NumberCells=1925
> > CellHeader=X Y PROBE PLEN ATOM INDEX
> > Cell1=132 0 N 25 0 132
> > Cell2=652 0 N 25 0 652
> > Cell3=648 0 N 25 0 648
> > ...
> >
> > I'd like to be able to parse this structure.
> >
> > Ideally, I'd like for a QC node, to have a dictionary with
> > {'number':1
> > 'type' : 15
> > 'NumberCells' : 1925
> > 'Table' : [{'cell':1,'x':132,'y':0,'probe':25,'plen':0,'atom':132',
> > 'index':None}, {'cell':2 ....
> >
> > I'm running into the following problems:
> >
> > 1. I can't seem to use delimitList() to define a rule that parses the
> > right hand side of the table into
> > ['x','y','probe','plen','atom','index']. I think it's because my lists
> > are whitespace delimited.
> >
> > 2. I can't seem to convert value into an integer, for example, I can
> > parse each row in the table to :
> >  ['Cell','2','=', '652 0 N 25 0 652']
> > but am unable to get the setParseAction(see below) to convert and
> > substitute in the right value.
> >
> > Any hints will help a great deal. Thanks...
> >
> > Raoul-Sam
> >
> >
> > I have some ugly non functional code below..
> >
> > def cdffile_BNF():
> >    global cdfbnf
> >
> >    if not cdfbnf:
> >        makeint = Word(nums).setParseAction( lambda s,l,t:[int(t[0])])
> >        equals = Literal("=").suppress()
> >        nonequals = "".join( [ c for c in printables if c != "=" ] ) +
> > " \t"
> >
> >        key = Word(nonequals)
> >        value = Word(nonequals)
> >        kvp = Group(key + equals + restOfLine)
> >        kvpBlk = OneOrMore(kvp)
> >
> >        headerCell = delimitedList(Word(alphanums)," ")
> >        rowHeader = Combine( Literal("CellHeader") + equals +
> > headerCell)
> >        row = Combine(Literal("Cell").suppress() + restOfLine)
> >        rows = OneOrMore(row)
> >
> >        CDF = Literal("[CDF]")
> >        CDFBlk = Group(CDF + kvpBlk)
> >
> >        CHIP = Literal("[CHIP]")
> >        CHIPBlk = Group(CHIP + kvpBlk)
> >        CHIPBlk.setResultsName("chip")
> >
> >        QC = Combine( Literal("[QC").suppress() + Word(nums) +
> > Literal("]").suppress())
> >        QCBlk = QC + kvp + kvp + rowHeader + rows
> >
> >        cdfbnf = CDFBlk + CHIPBlk + QCBlk
> >
> >    return cdfbnf