456.py Setting variables with Python

[LaidlawFX]

I'm trying to use python to parse $HIP and define variables in houdini. Each Variable Project_Code, Sequence, Shot, and Task can be indeterminant length, so I only really know by the / what each value means. Since I can only use set -g in hscript how would I set these variables?

 

For instance version is based on hipname, but I need to do somethign like:

hou.hscript('set -g PROJECTCODE' = `pythonexprs("hipSplit[1]")` )

Which doesn't work in context.

 

$HIP = P:\projects\Project_Code\Sequence\Shot\Task\

--------------------------------------------------------------------

import hou

path = hou.hscriptExpression('$HIP')
hipSplit = path.rsplit('/')[1:]
## hipSplit example ['projects', 'Project_Code', 'Sequence', 'Shot', 'Task']

 

## Sets houdini variable $PROJECTCODE
## PROJECTCODE = hipSplit[1]

## hipSplit[1] is Project_Code

 

etc...

 

## Sets houdini variable $VERSION
hou.hscript('set -g VERSION = `evals(substr($HIPNAME,0,evals(strlen($HIPNAME)-4)))`')

 

----------------------------------------------------------------------

 

Thanks

-Ben

 

 

 

 

[koen]

Can you just use os.environ?

 

>>> import os

>>> hip = '/projects/Project_Code/Sequence/Shot/Task/blah.hip'
>>> tokens = hip.split('/')
>>> os.environ['PROJECT'] = tokens[2]
>>> hou.expandString('$PROJECT')

'Project_Code'

 

It also evaluates properly as a global variable for me.

 

Cheers,

koen

[LaidlawFX]

Thanks!

Unfortunately I will have to check tomorrow(need houdini for android today, lol), but does it work when multiple houdini sessions are open? I don't think it should conflict because of when it is run, but never used os.environ before.

[LaidlawFX]

Funny I self loop to this.

But found out for os.environ[HIP] can possibly evaluate differently than hou.hscriptExpression('$HIP') yeah random chance!

[ayidi]

I recommend using:

hou.getenv('VAR')
hou.putenv('VAR', 'value')