encrypt_path returns a tuple of file location and key whereas the PYCEPathFinder.KEYS accepts a dictionary.
>>> encrypt_path('.')
[('./hello.pyce', '69b9f28ba960bb3a83abef44950c99baf427f671bc33cd112cf87e22259ab835'), ('./mod.pyce', 'b6bea595bea6b95098d9b9a4f98e17cb399c99d3cdd99daeab5078757ec65f3c')]
PYCEPathFinder.KEYS = {'hello.pyce':'69b9f28ba960bb3a83abef44950c99baf427f671bc33cd112cf87e22259ab835','mod.pyce':'b6bea595bea6b95098d9b9a4f98e17cb399c99d3cdd99daeab5078757ec65f3c'}