All the Fedora live images are wrongly named. Their names look like this:

Fedora-Live-(content)-(arch)-(release)-(version)

but the naming policy says the image type ("live", in this case) and the indicator of the image's contents (payload) should be the other way around, so the name should be:

Fedora-(content)-Live-(arch)-(release)-(version)

(or lower-case 'live', but whatever). All the other images are named this way - we have Fedora-Server-boot-(blahblah), not Fedora-boot-Server-(blahblah). The lives break consistency, and thus when you want to find the image content you can't just do filename.split('-')[1].