http://stackoverflow.com/questions/8607544/django-could-not-load-template-tag/21588173#21588173
suppose you have the following structure:
– Application_Name
——-templatetags
————–init.py
————–templates_extras.py
——-init.py
——-settings.py
– manage.py
You have to make sure of the following:
your application itself inside which your “templatetags” is resident is actually installed in INSTALLED_APPS in settings.py (e.g. “Application_Name”)
your tag module itself that exists inside “templatetags” is already installed in INSTALLED_APP in settings.py (e.g. “ApplicationName.templatetags.tempaltes_extras”)
keep sure you have “init.py” under templatetags directory
you have to restart the server
In some cases you have to remove all generated *.pyc if it did not work then retry again