gfxhacks

# float
p = hou.FloatParmTemplate("float1", "Float 1", 1)

# button
p = hou.ButtonParmTemplate(
    "btn1", 
    "Button 1", 
    script_callback='print("Hello World!")',
    script_callback_language=hou.scriptLanguage.Python
),

gfxhacks

# define new folder
f = hou.FolderParmTemplate("myFolder", "My Folder")

# define new simple folder (no tab)
f = hou.FolderParmTemplate("myFolder", "My Folder", folder_type=hou.folderType.Simple)

# add parameter at bottom of folder
f.addParmTemplate(p)

# remove item from folder (same as for group)

gfxhacks

# cd to folder in Terminal, then run script using python.

import os

def createFolder(folder):
    try:
        if not os.path.exists(folder):
            os.makedirs(folder)
    except OSError:
        print ('Error creating folder: ' +  folder)

gfxhacks

# cd to folder in Terminal, then run script.

import os

def createFolder(folder):
    try:
        if not os.path.exists(folder):
            os.makedirs(folder)
    except OSError:
        print ('Error creating folder: ' +  folder)

gfxhacks

import os

def createFolder(folder):
    try:
        if not os.path.exists(folder):
            os.makedirs(folder)
    except OSError:
        print('Error creating folder: ' +  folder)
        
createFolder('My New Folder')