Ignore:
            fname = _fname
            cfgstr = _cfgstr

def get_fpath(self, cachedir=None, cfgstr=None, ext=None):
        """
        Ignore:
            fname = _fname
            cfgstr = _cfgstr
        """
        _dpath = self.get_cachedir(cachedir)
        _fname = self.get_prefix()
        _cfgstr = self.get_cfgstr() if cfgstr is None else cfgstr
        _ext =   self.ext if ext is None else ext
        fpath = _args2_fpath(_dpath, _fname, _cfgstr, _ext)
        return fpath