This will open the folder in Finder:-

os.system('open "%s"' % path)

I tried this code in the ScriptsMenu script, and it works fine.

EDIT: note the single quotes outside the double quotes.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)