meoooh · August 29, 2015 14:05
diff --git a/custom_tags.py b/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)
diff --git a/template.html b/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)