<[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Hi all
> I am a newbie and I just saw a ongoing thread on Fileprocessing which
> talks abt config parser.
> I have writen many pyhton program to parse many kind of text files by
> using string module and regex. But after reading that config parser
> thread I feel stunned.
>
> Can somebody tell me some intro info how to parse huge data (most of
> them are input data to application softwares like nastran, abaqus etc)
>
> Recently I saw a great work by John on Nastran file parser (i am still
> trying to understand the program,
> http://jrfonseca.dyndns.org/svn/phd/python/Data/Nastran/
>
> An example of dat may be like this, (part of)
> (say point id coordinateSysNo x,y,z ...)
> GRID 1 12478.0 0.0 256.75 1
> GRID 2 12357.25 0.0 256.75 1
> GRID 3 12357.25 0.0 199.0 1
> (say Elementtype id property point1 point 2 point3 point4 etc)
> CQUAD4 7231 21 5691 5700 5701 56920.0
>
> CQUAD4 7232 21 5692 5701 5702 56930.0
>
> CQUAD4 7233 21 5693 5702 5703 56940.0
>
> the data file is very complex if i consider all complexities)
>
> Is is possible to use config parser module insome way for this. I also
> have few perl parser (for some part for some particular tasks) and now
> changing them to python. (I feel perl regex combination is very easy to
> learn and very powerfull)
>
> Any information will be appreciated.
>
> -jiro
>
Here's some sample code that might give you some ideas.
-- Paul
data = """\
GRID 1 12478.0 0.0 256.75 1
GRID 2 12357.25 0.0 256.75 1
GRID 3 12357.25 0.0 199.0 1
CQUAD4 7231 21 5691 5700 5701 56920.0
CQUAD4 7232 21 5692 5701 5702 56930.0
CQUAD4 7233 21 5693 5702 5703 56940.0
"""
class Node(object):
def __init__(self,s):
self.__dict__.update( zip(self.getInitVarNames(), s.split()) )
def __str__(self):
return "%s %s" % (self.__class__.__name__, self.__dict__)
class GridNode(Node):
def getInitVarNames(self):
return "id,x,y,z,other".split(',')
class Cquad4Node(Node):
def getInitVarNames(self):
return "id,p1,p2,p3,p4,other".split(',')
# define mapping of leading keyword to class name
typeNodeClassMap = {
"GRID" : GridNode,
"CQUAD4" : Cquad4Node,
}
def makeNode(s):
nodeType,nodeArgs = s.split(" ",1)
nodeClass = typeNodeClassMap[nodeType]
return nodeClass( nodeArgs )
for line in data.split("\n"):
if line:
n = makeNode(line)
print n
--
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