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POHow to parse Django templates for template tags
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  1. POHow to parse Django templates for template tags
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    copied!<h2>Situation</h2> <p>I'm writing a checker program that checks Django templates. For example I want to check if all Django templates that use <code>url</code> template tag, use it with quotes on first parameter so that it is Django 1.5 compatible. Also I want to check that they have included <code>{% load url from future %}</code> in their templates.</p> <p>For example if my program parses the following Django template, I want it to raise an exception.</p> <pre><code>{% extends 'base.html' %} &lt;td&gt; &lt;a href="{% url first second %}"&gt; &lt;/a&gt; &lt;/td&gt; </code></pre> <p>But this template should get parsed without exception.</p> <pre><code>{% extends 'base.html' %} {% load url from future %} &lt;td&gt; &lt;a href="{% url 'first' second %}"&gt; &lt;/a&gt; &lt;/td&gt; </code></pre> <p>I'm not limited to this simple example. I have other parsings to do. For example I want to check how many <code>load</code> template tags are present in the template.</p> <h2>Question</h2> <p>How can I elegantly solve this parsing problem?</p> <ul> <li>I don't want to use regular expressions.</li> <li>I this Django it self has some utilities in this regard. I think using them is a good idea, but I don't know how.</li> <li>I want to run the program separately from Django. So I don't want Django to run the program itself (with <code>render_to_response</code>). (<strong>This is important</strong>)</li> </ul> <h2>Code</h2> <p>Please show me some code that can solve the example I mentioned. I want to detect whether <code>{% load url from future %}</code> is in the code. Also I want to check every <code>url</code> template tag and check if the first argument is quoted.</p> <p><strong>Bonus</strong>:</p> <ul> <li>I want to be able to see the rendered HTML that Django generates from this template, and do my HTML parsing on it. (for example with PyQuery)</li> </ul>
 

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