split string with python

[caledonian_tartan]

Hello everyone

how can i split a string into a list?

i have a string list and get this log:

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# Pass;Pass1;Pass2;Pass3;Pass4

What can i do to get this:

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# Pass
# Pass1
# Pass2
# Pass3
# Pass4

preferably in python

thanks in advance

[rray]

Not sure about python but in JS there's a split command that makes a string array out of a string and another separator string. Isn't there something similar in python?

[xsisupport]

Yes, of course there is.
http://docs.python.org/2/library/stdtypes.html#str.split
for p in 'Pass;Pass1;Pass2;Pass3;Pass4'.split(';'): print p

[caledonian_tartan]

cool, thanks for your help!

its working great on a simple example like:

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oSelectedPasses = "Pass2;Pass3;Pass4"
for p in oSelectedPasses.split(';'): print p

On the other Hand i use a callback of a selection of a PPG List Box as the string
in this case it was not successfull

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# ERROR : Traceback (most recent call last):
#   File "<Script Block 2>", line 146, in VRay_DR_Render_Render_OnClicked
#     for p in oSelectedPasses.split(';'):
#   File "C:\Autodesk\Softimage 2013\Application\python\Lib\site-packages\win32com\client\dynamic.py", line 500, in __getattr__
#     raise AttributeError, "%s.%s" % (self._username_, attr)
# AttributeError: <unknown>.split
#  - [line 145 in C:\Users\dude\Autodesk\Softimage_2013\Application\Plugins\VRay_DR_Render.py]
# ERROR : Property Page Script Logic Error (Python ActiveX Scripting Engine)
# ERROR :    [143] 		print "Render Selected Passes"
# ERROR :    [144] 		print PPG.PassesListToRender
# ERROR :   >[145] 		oSelectedPasses = PPG.PassesListToRender
# ERROR :    [146] 		for p in oSelectedPasses.split(';'): 
# ERROR :    [147] 			print p
# ERROR :    [148] 		print oSelectedPasses
# ERROR : 	Traceback (most recent call last):
#   File "<Script Block 2>", line 146, in VRay_DR_Render_Render_OnClicked
#     for p in oSelectedPasses.split(';'):
#   File "C:\Autodesk\Softimage 2013\Application\python\Lib\site-packages\win32com\client\dynamic.py", line 500, in __getattr__
#     raise AttributeError, "%s.%s" % (self._username_, attr)
# AttributeError: <unknown>.split
# 
# Render Selected Passes
# Pass2;Pass3;Pass4

[xsisupport]

PPG.PassesListToRender is a Parameter object, not a string.

[caledonian_tartan]

hmm.
can't i split the result of this?


PPG.PassesListToRender prints

# Pass1;Pass2;Pass3

how do i need to treat a Parameter Object?

[xsisupport]

You get the parameter value with its Value property.

With print PPG.SomeParam you are taking advantage a shortcut provided by the PPG object: a shortcut to the parameter value eg PPG.SomeParam.Value.

[caledonian_tartan]

ahyea. it's .value

this works!

thank you steve.

i think i'll need to look at this page again and again.

[caledonian_tartan]

i'm sorry, but again, it still confuses me.

how can i pack it back into one oSomething?
the following code does not work in line 4

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oSelectedPasses = PPG.PassesListToRender.Value
for p in oSelectedPasses.split(';'): 
    print p
    oSomething = p

i'd like to

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    print oSomething

# Pass1
# Pass2
# Pass3

so that i can print the values without the for loop...
some sort of a context problem i think

[xsisupport]

Why don't you just print PPG.PassesListToRender.Value ?
-or-

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x = "a;b;c;d;e"
print '\n'.join( x.split(';') )

[caledonian_tartan]

i finally got it working with your second method. thanks steve!

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oSelectedPasses = PPG.PassesListToRender.Value
oSome = '\n'.join( oSelectedPasses.split(';') )
print oSome
for frame in range( CStartVal , CEndVal + 1):
	Application.RenderPasses( "Passes." + oSome , frame, frame, 1, "" )

[caledonian_tartan]

apparently i was distracted and made a mistake.
this is only working if only one pass is selected.
otherwise it logs:

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Application.RenderPasses( "Passes.Pass2/nPass3n/Pass4" , frame, frame, 1, "" )

i eighter need to read the selected items of the box as an array/collection/group

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// VBS
var oListBox = oLayout.AddItem( "MyList", "", siControlListBox );
oListBox.SetAttribute( siUICY, 100 );

// 1D array of key,value pairs (since this is a string, just repeat them)
var aListItems = new Array( 
	"light", "light", 
	"sphere", "sphere", 
	"Camera", "Camera", 
	"Camera_Root", "Camera_Root", 
	"Camera_Interest", "Camera_Interest" 
);
oListBox.UIItems = aListItems;

or convert my splitted string into an an array/collection/group

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no clue...

[xsisupport]

You need to pass a comma-separated string of pass names eg

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Application.RenderAllPasses( "Passes.Default_Pass,Passes.Isolate_Matte" )

So you just need to replace the semi-colons with commas.

[caledonian_tartan]

you, Sir, are great! thanks mr. blair.

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oSelectedPasses = "Pass1;Pass2;Pass3"
oSelectedPasses = oSelectedPasses.replace(";",",Passes.")
print oSelectedPasses
for frame in range( 1 , 2 + 1):
   Application.RenderPasses( "Passes." + oSelectedPasses , frame, frame, 1, "" )

works great. tool almost finished.
this tool serves as a workaround to render VRay Animations with Distributed Rendering.
i will release it in the VRay4SI Forum tonight and maybe here if someone is interested.

thanks again for all of your help
Cheers
Jan

VRay_DR_Animation_Render.zip

EDIT.funFact: " i noticed, that if running this sript in an empty scene, it renders much faster on the following Passes than on the first. as it renders frame1, pass1, pass2, pass3, f2, p1, p2, p3... "
i'm not shure why, but rendering like this seems to increase mental ray renderspeed a little.