'return html link to file'

def _repr_html_(self):

    if (not exists(self.path)):
        return ("Path    (<tt>%s</tt>)    doesn't    exist.    It    may    still    be    in    the    process    of    being    generated,    or    you    may    have    the    incorrect    path." % self.path)
    return self._format_path()
