Hello All,
I'm trying to read a formatted text of strings and
floats. I have looked through previous posts and
couldn't deciper a good method. I'm new to python so
any suggestions would be helpful.
Regards,
Kevin
solid SIMPLEBLOCK
facet normal 0.000000e+00 0.000000e+00 -1.000000e+00
outer loop
vertex 1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 1.000000e+00 0.000000e+00
endloop
endfacet
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Kevin McBrearty wrote: Hello All,
I'm trying to read a formatted text of strings and
floats. I have looked through previous posts and
couldn't deciper a good method. I'm new to python so
any suggestions would be helpful.
Here is a solution using pyparsing (http://pyparsing.sourceforge.net).
The result is a nested list structure containing the original data in a
structured form
blocktype
list of facets
normal vector
list of vertices
Kent
from pyparsing import *
import string
point = Literal( "." )
e = CaselessLiteral ( "E" )
fnumber = Combine( Word( "+-"+nums, nums ) +
Optional( point + Optional( Word( nums ) ) ) +
Optional( e + Word( "+-"+nums, nums ) ) )
fnumber.setPars eAction( lambda s,l,t: [ float(t[0]) ] )
triple = Group(fnumber + fnumber + fnumber)
normal = Suppress('norma l') + triple
vertex = Suppress('verte x') + triple
facet = Suppress('facet ') + normal + Suppress('outer loop') +
Group(OneOrMore (vertex)) + Suppress('endlo op')
blockType = Word(string.upp ercase)
solid = Suppress('solid ') + blockType + Group(OneOrMore (facet))
data = '''
solid SIMPLEBLOCK
facet normal 0.000000e+00 0.000000e+00 -1.000000e+00
outer loop
vertex 1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 1.000000e+00 0.000000e+00
endloop
endfacet
'''
print solid.parseStri ng(data)
prints:
['SIMPLEBLOCK', [[0.0, 0.0, -1.0], [[1.0, -1.0, 0.0], [-1.0, -1.0, 0.0],
[-1.0, 1.0, 0.0]]]]
Regards,
Kevin
solid SIMPLEBLOCK
facet normal 0.000000e+00 0.000000e+00 -1.000000e+00
outer loop
vertex 1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 -1.000000e+00 0.000000e+00
vertex -1.000000e+00 1.000000e+00 0.000000e+00
endloop
endfacet
_______________ _______________ ____
Do you Yahoo!?
The all-new My Yahoo! - Get yours free!
http://my.yahoo.com
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