def __str__(self):
try:<EOL><INDENT>return self._str<EOL><DEDENT>except AttributeError:<EOL><INDENT>self._str = self._format_parsed_parts(self._drv, self._root,<EOL>self._parts) or '<STR_LIT:.>'<EOL>return self._str<EOL><DEDENT>
Return the string representation of the path, suitable for
        passing to system calls.