Same here. If I use the full path of the Finder.app in place of the text 'finder', it gives that permission denied message again. Does this suggest that Python is finding the Finder.app, but the OS is not allowing Python to execute it?

"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)