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===========================
Example -- Using ``twistd``
===========================
Another important integration point with Twisted is the `twistd application runner <https://docs.twisted.org/en/stable/core/howto/tap.html>`_.
It provides rich logging support, daemonization, reactor selection, profiler integration, and many more useful features.
To provide access to these features (and others like HTTPS) klein provides the ``resource`` function which returns a valid :api:`twisted.web.resource.IResource <IResource>` for your application.
Here is our "Hello, World!" application again in a form that can be launched by ``twistd``::
from klein import resource, route
@route('/')
def hello(request):
return "Hello, world!"
To run the above application we can save it as ``helloworld.py`` and use the ``twistd web`` plugin::
PYTHONPATH=. twistd -n web --class=helloworld.resource
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