[Sidefx-houdini-list] Python expression in a group sop

Simon Barrick simon at primalpictures.com
Wed Apr 22 08:58:16 EDT 2009

Ok so I've made a python function in the otl but I still basically have
the same problem, when I use it in the group sop it doesn't actually
evalute it just uses the code as the group name. 

So this


Becomes my group name as


Is there an equivalent to backticks used in hscript for python
expressions that force them to evaluate?

-----Original Message-----
From: sidefx-houdini-list-bounces at sidefx.com
[mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of Mark Elendt
Sent: 22 April 2009 12:37
To: sidefx-houdini-list at sidefx.com
Subject: Re: [Sidefx-houdini-list] Python expression in a group sop

On Wednesday Apr 22 at 12:30, Simon Barrick wrote:
>  Does anyone know how to get python expressions to evaluate in a group

> sop?
> I have this expression that pulls a name from a path
> os.path.split(hou.pwd().parent().parm('file').eval())[1].split('.')[0]
> But when I stick it in the Group Name field it won't actually
> Also, I'm having to use os.path which may not be available without 
> importing 'os' so is there a hou way of doing this?

You might try something like:


Though that might be insanely expensive.

It might be better to create a python function which builds the pattern
string for you.

Mark Elendt

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