如何在python jinja模板中输出loop.counter? [英] How to output loop.counter in python jinja template?

问题描述

我希望能够将当前循环迭代输出到我的模板.

I want to be able to output the current loop iteration to my template.

根据文档: http://wsgiarea.pocoo.org/jinja/docs /loops.html ，我正在尝试使用一个loop.counter变量.

According to the docs: http://wsgiarea.pocoo.org/jinja/docs/loops.html, there is a loop.counter variable that I am trying to use.

我有以下内容:

<ul>
{% for user in userlist %}
  <li>
      {{ user }} {{loop.counter}}
  </li>
      {% if loop.counter == 1 %}
          This is the First user
      {% endif %}
{% endfor %}
</ul>

尽管没有任何输出到我的模板.正确的语法是什么?

Though nothing is being output to my template. What is the correct syntax?

推荐答案

循环的计数器变量在jinja2中称为 loop.index .

The counter variable inside the loop is called loop.index in jinja2.

>>> from jinja2 import Template

>>> s = "{% for element in elements %}{{loop.index}} {% endfor %}"
>>> Template(s).render(elements=["a", "b", "c", "d"])
1 2 3 4

有关更多信息，请参见 http://jinja.pocoo.org/docs/templates/

See http://jinja.pocoo.org/docs/templates/ for more.

这篇关于如何在python jinja模板中输出loop.counter?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！