Add Icon path to XBMLANGPATH

addIconPathToXBMLANGPATH.py

import maya.mel as mel

try:
    xbmLangPaths = mel.eval("getenv XBMLANGPATH;")
except:
    xbmLangPaths = ''

addPath = r";D:/Test/icons"
if not addPath in xbmLangPaths:
    xbmLangPaths += addPath

mel.eval('putenv "XBMLANGPATH" "{}";'.format(xbmLangPaths))

#xbmLangPaths = mel.eval("getenv XBMLANGPATH;").split(";")
#for path in xbmLangPaths:
#    print(path)