def make_epub(binders, file):
    """Creates an EPUB file from a binder(s)."""
    if not isinstance(binders, (list, set, tuple,)):
        binders = [binders]
    epub = EPUB([_make_package(binder) for binder in binders])
    epub.to_file(epub, file)
Creates an EPUB file from a binder(s).