Jinja - Template language

Jinja is an open source template language created in 2006 by Armin Ronacher.

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git clone https://github.com/pallets/jinja

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Jinja is a template engine for the Python programming language and is licensed under a BSD License created by Armin Ronacher. It is similar to the Django template engine but provides Python-like expressions while ensuring that the templates are evaluated in a sandbox. It is a text-based template language and thus can be used to generate any markup as well as sourcecode. Read more on Wikipedia...

Tags: template language
Jinja is developed on GitHub and has 10,136 stars
There are at least 37,267 Jinja repos on GitHub
Early development of Jinja happened in https://github.com/pallets/jinja/issues/
Jinja is written in Python, reStructuredText, YAML, HTML, Markdown, SVG, TOML, Ini, JSON, Make, Bourne shell
The Google BigQuery Public Dataset GitHub snapshot shows 701 users using Jinja in 981 repos on GitHub
GitHub supports syntax highlighting for Jinja
See also: (5 related languages) Python, Django, Smarty, Unix, ISBN

Example from Linguist:

<h1>Workers</h1>

<table class="workers">
  <tr>
    <th>Job server</th>
    <th>IP</th>
    <th>File descriptor</th>
    <th>Client ID</th>
    <th>Functions</th>
  </tr>

{% for server_info in server_infos %}
  <tr {% if server_info['failed'] %} class="failure" {% endif %} >
    
    <th>{{ server_info['hostport'][0] }}:{{ server_info['hostport'][1] }}</th>
    <th>
      {%- if server_info['failed'] -%} Not responding! {%- endif -%}
    </th>
    <th></th>
    <th></th>
    <th></th>
  </tr>
  
  {% if not server_info['failed'] %}
    {% for worker in server_info['workers'] %}
    <tr>
      <td class="server"></td>
      <td class="ip">{{ worker['ip'] }}</td>
      <td class="file_descriptor">{{ worker['file_descriptor'] }}</td>
      <td class="client_id">{{ worker['client_id'] }}</td>
      <td class="functions">
        {{ worker['tasks']|join(', ') }}
      </td>
    </tr>
    {% endfor %}
  {% endif %}
{% endfor %}
</table>

Example from Wikipedia:

<!DOCTYPE html>
<html>
  <head>
    <title>Value with &lt;unsafe&gt; data</title>
  </head>
  <body>
    1,
    2,
    3,
    4,
    5,
    6
  </body>
</html>