class DirectoryAliaser( dict):
    ns_sep="::"
    def __init__( self, path):
        dict.__init__(self)
        self.update([(self.key_name_from_filename(fn,path),fn) for fn in listdir(path)])
    def key_name_from_path( self, *path):return self.ns_sep.join( path)
    def key_name_from_filename( self, filename, path):
        return filename[:filename.rfind('.')][len(os.path.join(os.getcwd(),path)):].replace( os.sep, self.ns_sep)[len(self.ns_sep):].lower()