使用SQLAlchemy，Jinja2和Flask从键列表中输出值

part of the html:

部分HTML:

{% for device in casperdevices %}
        <tr>
        {% for key in casperkeys %}
            <td>
                {{ _('%(key)s', key=device[key]) }}
            </td>
            {% if key == 'Report URL' %}
            <td>
                <p><a href="/go.html?url={{ _('%(key)s', key=device[key]) }}">
                    {{ _('%(key)s', key=device[key]) }}</a><p>
            </td>
            {% endif %}
        {% endfor %}
        </tr>
    {% endfor %}
{% for device in