这样做，

{% for days in days_list %}
    <h2># Day {{ forloop.counter }} - From {{ days.from_location }} to {{ days.to_location }}</h2>
{% endfor %}

这样做，

{% for days in days_list %}
    <h2># Day {{ forloop.counter }} - From {{ days.from_location }} to {{ days.to_location }}</h2>
{% endfor %}

Django提供了它。你可以使用任何一种:

{{forloop。Counter}}索引从1开始。 {{forloop。Counter0}}索引从0开始。

在模板中，你可以这样做:

{% for item in item_list %}
    {{ forloop.counter }} # starting index 1
    {{ forloop.counter0 }} # starting index 0

    # do your stuff
{% endfor %}

更多信息在:|内置模板标签和过滤器| Django文档

你也可以用这个:

{% if forloop.first %}

or

{% if forloop.last %}

{% for days in days_list %}
    <h2># Day {{ forloop.counter }} - From {{ days.from_location }} to {{ days.to_location }}</h2>
{% endfor %}

或者你想从0开始

{% for days in days_list %}
        <h2># Day {{ forloop.counter0 }} - From {{ days.from_location }} to {{ days.to_location }}</h2>
{% endfor %}

[Django HTML模板现在不支持索引]，但是你可以达到这个目标:

如果在views.py中使用Dictionary内部Dictionary，则可以使用key作为索引进行迭代。例子:

{% for key, value in DictionartResult.items %} <!-- dictionartResult is a dictionary having key value pair-->
<tr align="center">
    <td  bgcolor="Blue"><a href={{value.ProjectName}}><b>{{value.ProjectName}}</b></a></td>
    <td> {{ value.atIndex0 }} </td>         <!-- atIndex0 is a key which will have its value , you can treat this key as index to resolve-->
    <td> {{ value.atIndex4 }} </td>
    <td> {{ value.atIndex2 }} </td>
</tr>
{% endfor %}

如果在字典中使用List，那么不仅可以控制第一次和最后一次迭代，而且可以控制所有索引。例子:

{% for key, value in DictionaryResult.items %}
    <tr align="center">
    {% for project_data in value %}
        {% if  forloop.counter <= 13 %}  <!-- Here you can control the iteration-->
            {% if forloop.first %}
                <td bgcolor="Blue"><a href={{project_data}}><b> {{ project_data }} </b></a></td> <!-- it will always refer to project_data[0]-->
            {% else %}
                <td> {{ project_data }} </td> <!-- it will refer to all items in project_data[] except at index [0]-->
            {% endif %}
            {% endif %}
    {% endfor %}
    </tr>
{% endfor %}

结束If;)

// 希望已经覆盖的解决方案与字典，列表，HTML模板，循环，内部循环，如果Else。 Django HTML Documentaion更多方法:https://docs.djangoproject.com/en/2.2/ref/templates/builtins/