{#    从0开始的索引#}
{% for foo in value %}
     <p>{{ forloop.counter0 }}: {{ foo }}</p>

{% endfor %}

{#    从1开始的索引#}
{% for foo in value %}
     <p>{{ forloop.counter }}: {{ foo }}</p>

{% endfor %}

{#    索引倒叙#}
{% for foo in value %}
     <p>{{ forloop.revcounter0 }}: {{ foo }}</p>

{% endfor %}

for循环