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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>##I know I should be using 2.4 and <span class=SpellE>os.Popen</span>,
I know, I know…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>##However, since most modules I need, I’m using 2.3
for this script<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m having troubles executing a shell script.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The thing is that I’m <span class=SpellE>produing</span>
material and geometry files that need to be compiled to a binary description (for
those familiar to Radiance, <span class=SpellE>oconv</span>)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The trouble I’m having is that when python goes
through my loop, files are overwritten before <span class=SpellE>os.system</span>
was able to process these! (<span class=GramE>who</span> ways complaining
python is slow, well I’m not!! ;-) So the obvious thing to do is to swap <span
class=SpellE>os.system</span> for <span class=SpellE>os.spawnv</span>.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Here’s where I run into trouble.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In my <span class=SpellE>os.system</span> version, I’m
perfectly able to pipe into another file<span class=GramE>, <span
style='mso-spacerun:yes'> </span>since</span> the process has no real
connection to python whatsoever.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Would someone be able to explain me how to do this, all the
tools I’m using for this script are <span class=SpellE>unix</span>-like
tools and heavily rely on piping.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>program</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> =
'xform.exe'<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>path</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> =
'c:\Radiance\bin\'<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>args</span></font></span></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> = ['-t 0 8
0', 'wall0.rad', '>', 'wall0.TRANS.rad']<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>os.spawnv</span></font></span></span><span
class=GramE><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>(</span></font></span><span class=SpellE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>os.P_WAIT</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>, path, ('<span
class=SpellE>xform</span>', <span class=SpellE>args</span>))<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>here’s</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> the <span
class=SpellE>cmd</span> error message:<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>xform</span></font></span></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>: cannot
find file ">"<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>##for your info I’m on win/<span class=SpellE>xp</span>,
python 2.3.4<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Cheers,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Jelle.<o:p></o:p></span></font></p>
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