houdiniPython.py

from datetime import datetime, timedelta
import os
import traceback


# This code is called when instances of this SOP cook.
node = hou.pwd()
geo = node.geometry()

myLocals = {
    'hou' : hou,
    'node' : node,
    'geo' : geo,
}
myLocals.update({
    p.name() : p.eval()
    for p in node.parms()
    if p.name() is not 'pythonFile'
})



now = datetime.now()

pythonFile = node.evalParm('pythonFile')
def readFile():
    global lastFileTime, script

    try:
        with open(pythonFile) as f:
            script = f.read()
    except IOError as e:
        print 'could not find script file: ', e 
        raise e

    #print now, 'file refreshed: ', pythonFile
    lastFileTime = now


if 'lastFileTime' not in globals():
    readFile()
if (now - lastFileTime) > timedelta(seconds=2): 
    readFile()



try:
    globals().update(myLocals)
    exec(script)
except Exception as e:
    # print 'ERROR: ', e 
    print traceback.format_exc()
    raise e

create operator node with a parameter "pythonFile" which is a file selector