code: def split_filename(pathname):
          
          filepart = win32.PathFindFileName(pathname)
          pathpart = win32.PathRemoveFileSpec(pathname)
          return (pathpart, filepart)
docs: @type  pathname: str
          @param pathname: Absolute path.
  
          @rtype:  tuple( str, str )
          @return: Tuple containing the path to the file and the base filename.