Version 1.2 introduces the pythonista:// URL scheme for opening and running scripts in your library. Using Safari web clips (home screen bookmarks), you can use this to create dedicated icons for your scripts on the home screen.
As of now, this is pretty much a proof of concept, there's no way to select different icons, and the UI is pretty sparse, but if you like experiments, open this page on a device that has Pythonista installed:
http://omz-software.com/pythonista/shortcut