48 def touser(npath):  argument
52 def tosys(npath):  argument
73 def exists(npath):  argument
76 def split(npath):  argument
79 def splitext(npath):  argument
82 def basename(npath):  argument
85 def dirname(npath):  argument
88 def abspath(npath):  argument
95 def normpath(npath):  argument
98 def isdir(npath):  argument
101 def isfile(npath):  argument
104 def getsize(npath):  argument