hda python problem

[Omy]

The given below is a little snippet of my hda code.This is a shelf tool I am trying to implement.If i click once.It creates the operation well.But if i click the tool more than once.It does throw some error.Please let me know how to correct this.Thank you.

obj = hou.node('/obj') 
creategeo=obj.createNode('geo','geo1') 
s=obj.collapseIntoSubnet((creategeo,),'HOUDIGASS').moveToGoodPosition() 
subnets = hou.nodeType(hou.objNodeTypeCategory(), "subnet")
su_inst=subnets.instances()
for x in su_inst:
    myhd=x.createDigitalAsset('myhda')
    for parm in myhd.parmTuples():
        hideparm=parm.hide(True)
houda=hou.node('/obj/HOUDIGASS')
ol=hou.StringParmTemplate("llist","List",1,default_value=([""]),naming_scheme=hou.parmNamingScheme.Base1,string_type=hou.stringParmType.NodeReferenceList,menu_items=([]),menu_labels=([]),icon_names=([]),item_generator_script="",item_generator_script_language=hou.scriptLanguage.Python,menu_type=hou.menuType.Normal)
houda.addSpareParmTuple(ol)
#multiparm folder list
bgeo=hou.FolderParmTemplate("bgeofolder","Add BGEO",folder_type=hou.folderType.MultiparmBlock,default_value=0,ends_tab_group=False)
houda.addSpareParmTuple(bgeo)

[Green-Man]

After first launching of the script you have "/obj/HOUDIGASS" node created with it's params.

When you launch the script second time you already have the "/obj/HOUDIGASS" created. And with houda.addSpareParmTuple(ol) you want to add param tuple with the name "llist" which already exists in this node.

You probably should create "/obj/HOUDIGASS" subnet not with the hardcoded name but with addition 1,2,3... to the end like Houdini does it by default.

[Omy]

i think its not working.I have added a number 1 to the end.but still it throws me some error.Does it work for you?

[sam.h]

What do you want the script to do on the second run?

[Omy]

What do you want the script to do on the second run?

Hi Sam,

Basically nothing.I would like to behave this as a shelf tool.If the user clicks the tool for the 2nd time.I want to place the node 2nd time in the network.But if i click more than once im getting problem.Any solutions would be really coool

Thanks

[sam.h]

Why are you creating a digital asset on the script? Do you want a new digital asset each time?

It seems like you don't need a shell script at all. Just make a digital asset, and you can creat a new node with the tab menu.

[Omy]

Why are you creating a digital asset on the script? Do you want a new digital asset each time?

It seems like you don't need a shell script at all. Just make a digital asset, and you can creat a new node with the tab menu.

I thought of making it as a shelf tool.

[Green-Man]

Yeah, its always a good idea to know what we want to have as a final result

Maybe instead of creating a DA it would be better to just create a bunch of nodes and its params with your shelf tool. Now the script tends to create new DA on every using a shelf tool. But DAs didn't designed to behave like this. In addition if I'll choose HOUDIGASS from TAB menu it will creates not the same object as I'll create with a shelf tool. Its because you make changes in HOUDIGASS after creating it in your script.

[Omy]

@Green Man

Which is the best way to create digital assets using script.Previously i tried creating all the nodes and parms and then hda-ed.But Later i got lot of referencing problems so now planning to rewrite it again!let me know what you think

[Green-Man]

I'm not a good specialist so you'd better to wait more responsible answer.

And I think you don't really need the DA but need just a Subnetwork with operators. All the problems you had with referencing you will have if you choose the way of creating DA.

[Omy]

it would be great if someone can give a hand in correcting this