How to import a template tag in the interactive shell?

Question

How can I import a custom template tag or filter in the interactive shell to see if the everything is working fine?

I have two machines behaving differently and I don't have a clue of how to do some debugging.

On the production machine I can't load a template filter, I get the error "Template library not found". On the local machine everything works fine.

Answer 1

If you're worried about typos, missing __init__.py problems or masked ImportErrors, you could just import the function. Assuming the following structure:

foo
├── bar
│   ├── __init__.py
│   ├── models.py
│   ├── static
│   │   └── ..
│   ├── templates
│   │   └── ..
│   ├── templatetags
│   │   ├── __init__.py
│   │   └── baz.py
│   ├── views.py
├── manage.py
└── foo
    ├── __init__.py
    ├── settings.py
    ├── urls.py
    └── wsgi.py

and the following contents of baz.py:

from django import template

register = template.Library()

@register.filter
def capitalize(value):
    return value.capitalize()

you would just run

>>> from bar.templatetags import baz
>>> print baz.capitalize('test')
'test'