TemplateSyntaxError: 'newtags' is not a valid tag library

by Jan Wedel , published on March 2, 2014 in Tech

I've just added a module with new template filters

myapp/templatetags/__init__.py
myapp/templatetags/newtags.py

and tried to load it:

{% load newtags.py %}

Then, I got the following error:

TemplateSyntaxError: 'newtags' is not a valid tag library

I was trying everything and it didn't work. The I found this question on StackOverflow.

TLDR: Restart the development server, then the new tags file gets loaded.