This class is derived from
takes an additional constructor argument: the base
path name for the directory subtree, necessary so we can
display the path name for this link relative to that base
# - - - - - c l a s s L i n k I n f o - - - - - class LinkInfo(pathinfo.PathInfo): """Represents information about one file; sorts by path name. Exports (other than those inherited): LinkInfo ( path, basePath ): [ (path is the path name to a file) and (basePath is the path name of a directory above path) -> return a new LinkInfo instance with those values ] .__str__ ( self ): [ return a multiline string describing self's path, whether or not it is a broken link, and where it points ] State/Invariants: .__basePath: [ as passed to constructor ] """