meoooh/custom_tags.py

## custom_tags.py
# reference: https://docs.djangoproject.com/en/1.6/howto/custom-template-tags/

@register.filter
def get_index(l, element):
    return l.index(element)

## template.html
<html>
    <head></head>
    <body>
        <!-- mylist = [0, 1, 3] -->
        <p>{{ mylist|get_index:3 }}</p>
    </body>
</html>

{% comment "result" %}
result:

<html>
    <head></head>
    <body>
        <!-- mylist = [0, 1, 3] -->
        <p>2</p>
    </body>
</html>
{% endcomment %}
	# reference: https://docs.djangoproject.com/en/1.6/howto/custom-template-tags/

	@register.filter
	def get_index(l, element):
	return l.index(element)
	<html>
	<head></head>
	<body>
	<!-- mylist = [0, 1, 3] -->
	<p>{{ mylist\|get_index:3 }}</p>
	</body>
	</html>

	{% comment "result" %}
	result:

	<html>
	<head></head>
	<body>
	<!-- mylist = [0, 1, 3] -->
	<p>2</p>
	</body>
	</html>
	{% endcomment %}