How to make executable .py file (for non-programmer)?
You can simply rename the file and make it file extension "command" instead. Plus, you have to make it executable (like you do before with chmod +x). Simply name it "jinja.command", instead of "jinja.py" for example.

Then, you will see terminal window opened with text output (if you have one in your application), as far as the "program terminated" string.