django shortcuts.py

# Load custom template tags in all templates
# Custom template tags that you use all over your templates can be auto loaded. Just add the following in a module that is # loaded (i.e. your urlconf if you want the template tags to be loaded for the whole project)

from django import template
template.add_to_builtins('project.app.templatetags.custom_tag_module')

# relative paths

import os.path
TEMPLATE_DIRS = (
    os.path.join(os.path.dirname(__file__), "templates"),
)