What library does Clonezilla use for TUI?

What library does Clonezilla use to show menus, dialogs, etc in its text user interface? I would like to use it directly as a fail-safe option for GUI apps when no GUI subsystem is available. I presume it is a C library. Does it have python bindings? I think it would be built on curses, but is there any additional layer on top of that, or is it bare-bones curses? I'd like to be able to create UIs like this: