如何在python jinja模板中输出loop.counter？
如何在python jinja模板中输出loop.counter？
提问于 2012-08-28 00:02:20
我希望能够将当前循环迭代输出到我的模板中。
根据文档：http://wsgiarea.pocoo.org/jinja/docs/loops.html，有一个我正在尝试使用的loop.counter变量。
我有以下几点：
<ul>
{% for user in userlist %}
<li>
{{ user }} {{loop.counter}}
</li>
{% if loop.counter == 1 %}
This is the First user
{% endif %}
{% endfor %}
</ul>尽管没有输出到我的模板中。正确的语法是什么？
回答 5
Stack Overflow用户
发布于 2014-07-25 23:24:06
在for-loop块中，您可以访问一些特殊的变量，包括loop.index，但不能访问loop.counter。来自the official docs
Variable Description
loop.index The current iteration of the loop. (1 indexed)
loop.index0 The current iteration of the loop. (0 indexed)
loop.revindex The number of iterations from the end of the loop (1 indexed)
loop.revindex0 The number of iterations from the end of the loop (0 indexed)
loop.first True if first iteration.
loop.last True if last iteration.
loop.length The number of items in the sequence.
loop.cycle A helper function to cycle between a list of sequences. See the explanation below.
loop.depth Indicates how deep in a recursive loop the rendering currently is. Starts at level 1
loop.depth0 Indicates how deep in a recursive loop the rendering currently is. Starts at level 0
loop.previtem The item from the previous iteration of the loop. Undefined during the first iteration.
loop.nextitem The item from the following iteration of the loop. Undefined during the last iteration.
loop.changed(*val) True if previously called with a different value (or not called at all).Stack Overflow用户
发布于 2019-01-10 10:52:37
如果您正在使用django，请使用forloop.counter而不是loop.counter
<ul>
{% for user in userlist %}
<li>
{{ user }} {{forloop.counter}}
</li>
{% if forloop.counter == 1 %}
This is the First user
{% endif %}
{% endfor %}
</ul>Stack Overflow用户
发布于 2020-11-30 18:51:30
将此{% if loop.counter == 1 %}更改为{% if forloop.counter == 1 %} {#your code here#} {%endfor%}
这是从{{ user }} {{loop.counter}}到{{ user }} {{forloop.counter}}
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原文链接：
https://stackoverflow.com/questions/12145434
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