for installing extensions changed slightly to be more
            consistent with the rest of the options to
            <span class='code'>setup.py</span>.</p>
        <table>
            <tr class="first_row">
                <td style='width:50%'>2.7</td>
                <td>3.0</td>
            </tr>
            <tr>
                <td>
                <pre class='tty'>setup.py --extension --install extensions/basic
setup.py --extension --install basic.tar.gz
setup.py --extension --uninstall basic
setu