The index.html way is really easy. Create public_html/index.html <meta http-equiv="refresh" content="0; url=cgi-bin/index.py" />
With this option people who go to domain.heliohost.org will end up at domain.heliohost.org/cgi-bin/index.py Making python scripts executable in public_html is a little more complicated. Create public_html/.htaccess # this line makes the python code execute instead of display the source
AddHandler cgi-script .py
# this line executes index.py if no file is specified
DirectoryIndex index.py
With this option people who do to domain.heliohost.org will see that in their browser url bar.