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Turtles all the way down
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djng ==== (pronounced "djing", with a mostly-silent "d") Blog entry: http://simonwillison.net/2009/May/19/djng/ Mailing list: http://groups.google.com/group/djng djng is a micro-framework that depends on a macro-framework (Django). My definition of a micro-framework: something that lets you create an entire Python web application in a single module: import djng def index(request): return djng.Response('Hello, world') if __name__ == '__main__': djng.serve(index, '0.0.0.0', 8888) Or if you want hello and goodbye URLs, and a custom 404 page: import djng app = djng.ErrorWrapper( djng.Router( (r'^hello$', lambda request: djng.Response('Hello, world')), (r'^goodbye$', lambda request: djng.Response('Goodbye, world')), ), custom_404 = lambda request: djng.Response('404 error', status=404), custom_500 = lambda request: djng.Response('500 error', status=500) ) if __name__ == '__main__': djng.serve(app, '0.0.0.0', 8888) Under the hood, djng will re-use large amounts of functionality from Django, while re-imagining various aspects of the framework. A djng request object is a Django HttpRequest object; a djng response object is a Django HttpResponse. Django's template language and ORM will be available. Ideally, Django code will run almost entirely unmodified under djng, and vice versa. Services, not Settings ====================== I dislike Django's settings.py file - I often find I want to reconfigure settings at run-time, and I'm not comfortable with having arbitrary settings for so many different aspects of the framework. djng experiments with /services/ in place of settings. Services are bits of shared functionality that djng makes available to applications - for example, caching, templating, ORM-ing and mail-sending. Most of the stuff that Django sets up in settings.py will in djng be set up by configuring services. These services will be designed to be reconfigured at run-time, using a mechanism similar to Django middleware. Some things that live in settings.py that really don't belong there - middleware for example. These will generally be constructed by composing together a djng application in code. I'm still figuring out how the syntax for services should work.