EHLO

In the following code I am doing two list lookups. Is there a way or  
a trick to have a if: else: to optimize this ?

       <td class="center" py:if="not tg.identity.anonymous">
        <span py:if="tg.identity.user not in g.users">
          <a href="${tg.url('./join/%s' % g.id)}">
            <img src="/static/images/btn-plus.png" alt="+"
                 title="Join that group" /></a>
        </span>
        <span py:if="tg.identity.user in g.users">
          <a href="${tg.url('./leave/%s' % g.id)}">
            <img src="/static/images/btn-minus.png" alt="-"
                 title="Leave that group" /></a>
        </span>
       </td>

-fred-

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