python - 如何在jinja2中导入loopcontrol

Question

我需要在 jinja2 中为 for 循环使用 break。下面是我的代码:

{% for i in range (0, desc) %}{{ desclist[i] }} {% set length = length + desclist[i]|length %}{% if length >= 70 %}{% break %}{% endif %}{% endfor %}

并导入循环控制扩展:

但是，我得到如下错误:

jinja2.exceptions.TemplateSyntaxError: Encountered unknown tag 'break'.
Jinja was looking for the following tags: 'elif' or 'else' or 'endif'. The
innermost block that needs to be closed is 'if'.

有什么想法可以让这项工作成功吗？谢谢。

Answer 1

遇到同样的问题，在document之上实现

它说:

The following example creates a Jinja environment with the i18n extension loaded:jinja_env = Environment(extensions=['jinja2.ext.i18n'])

所以我尝试了这个，它最终解决了的错误...遇到未知标签...:

jinja_env = Environment(extensions=['jinja2.ext.loopcontrols'])