Hi,
to run a script through your hda, you can use the python module - it's quite easy to set up.

First go to the type properties of your hda, under parameters create a button and a file dictionary from which we will read the textures.

Then go to the Scripts tab, at the bottom left you will find the drop down menu for Event Handler, select the Python module, it is now selectable above.

Once you have selected the module you can start coding. For example:

def foo():
    import os
    # Read the texture folder path from node parameters (pwd is shortcut for hou.node(".") (current node))
    folder_path = hou.pwd().parm("txt_fld").eval()
    # Insert all texture paths contained in the folder into a list
    file_list = [os.path.join(folder_path, file) for file in os.listdir(folder_path)]

    print(file_list)   

this will return the paths of the contents specified by the parm file dictionary.

The last thing you need to do is to bind the foo() function to the button. Go back to the parameters tab, select your button, and under Callback Script, paste this snippet:

hou.phm().foo()

hou.phm() [www.sidefx.com]

Save, specify the texture folder and press the button. The files that are in the folder will be printed out.

The hip file is below.

Image Not Found

Attachments:
01.png (31.5 KB)
02.png (13.1 KB)
03.png (33.2 KB)
Load_Texture_Paths.hiplc (104.4 KB)

Attachments:
Houdini_python_error_01.JPG (66.6 KB)
Houdini_python_error_02.JPG (98.7 KB)