jinja/ansible convert string to boolean
<p>I need the simple thing - if variable is <code>false</code> or empty string, then evaluate to <code>false</code>. Otherwise evaluate to true.</p>

<p>I tried <code>bool(var)</code> but I'm getting:</p>

<pre><code>UndefinedError: 'bool' is undefined
</code></pre>

<p>Then I tried <code>var | bool</code> but even though var is non-empty, that evaluates to <code>false</code>. How to make that condition work??</p>