How do I use Django templates without the rest of Django?


Question

I want to use the Django template engine in my (Python) code, but I'm not building a Django-based web site. How do I use it without having a settings.py file (and others) and having to set the DJANGO_SETTINGS_MODULE environment variable?

If I run the following code:

>>> import django.template
>>> from django.template import Template, Context
>>> t = Template('My name is {{ my_name }}.')

I get:

ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.
1
99
10/14/2013 2:30:04 PM

Accepted Answer

The solution is simple. It's actually well documented, but not too easy to find. (I had to dig around -- it didn't come up when I tried a few different Google searches.)

The following code works:

>>> from django.template import Template, Context
>>> from django.conf import settings
>>> settings.configure()
>>> t = Template('My name is {{ my_name }}.')
>>> c = Context({'my_name': 'Daryl Spitzer'})
>>> t.render(c)
u'My name is Daryl Spitzer.'

See the Django documentation (linked above) for a description of some of the settings you may want to define (as keyword arguments to configure).

131
7/25/2013 12:31:57 AM

Jinja2 syntax is pretty much the same as Django's with very few differences, and you get a much more powerfull template engine, which also compiles your template to bytecode (FAST!).

I use it for templating, including in Django itself, and it is very good. You can also easily write extensions if some feature you want is missing.

Here is some demonstration of the code generation:

>>> import jinja2
>>> print jinja2.Environment().compile('{% for row in data %}{{ row.name | upper }}{% endfor %}', raw=True) 
from __future__ import division
from jinja2.runtime import LoopContext, Context, TemplateReference, Macro, Markup, TemplateRuntimeError, missing, concat, escape, markup_join, unicode_join
name = None

def root(context, environment=environment):
    l_data = context.resolve('data')
    t_1 = environment.filters['upper']
    if 0: yield None
    for l_row in l_data:
        if 0: yield None
        yield unicode(t_1(environment.getattr(l_row, 'name')))

blocks = {}
debug_info = '1=9'

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