I'm trying to use photos.pick_image to get an image from the camera roll. However, this is giving me a list index out of range error.

I tried using pick_asset instead (as per http://omz-software.com/pythonista/docs/ios/photos.html) and then calling get_image on this, but this seems to return a PIL error ("cannot identify image file for io.BytesIO object").

Can anyone help?