keywords: Houdini, Python Scripting Notes, Hython

Python Command Line

How to trigger button click event in python
import hou
vat = hou.node('/out/vertex_animation_textures1')
vat.setParms({"exportpath": "$HIP/export/test001"})

print('vat baking begin!')
How to execute python script file in command line interface
A simple script to kick off a certain ROP remotely, optionally
with a given framerange.
Usage: hython path/to/script/ /path/to/hipfile /hou/path/to/rop
TODO: Add options for multiple ROPs, hperf.
import hou, sys

# Load the hip file

# If framerange option, set it
#if sys.argv[3]:
#    hou.parmTuple( "%s/f" %(sys.argv[2]) ).set((sys.argv[3],sys.argv[4],1.0))

# Start the render

# When finished, exit
How to write hbatch command

Python in Node

How to print frame number?
node = hou.pwd()
geo = node.geometry()

print("frame:", hou.frame())


Unable to open hip file


C:\scripting>hython "C:\scripting\test.hip"
Traceback (most recent call last):
File "C:\scripting\", line 4, in <module>
File "C:\PROGRA~1/SIDEEF~1/HOUDIN~1.303/houdini/python3.9libs\", line 52084, in load
	return _hou.hipFile_load(self, file_name, suppress_save_prompt, ignore_load_warnings)
hou.OperationFailed: The attempted operation failed.
Unable to open file: C:/ws_houdini/scripting/test.hip

Caused by:
hip file was renamed.

Rename hip file name to original name named on creation.


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“As far as we can discern, the sole purpose of human existence is to kindle a light of meaning in the darkness of mere being.” ― Carl Gustav Jung