You would like to move from Pylons 1.0 to Pyramid, but you're not going to be able manage a wholesale port any time soon. You're wondering if it would be practical to start using some parts of Pyramid within an existing Pylons project.
One idea is to use a Pyramid "NotFound view" which delegates to the existing Pylons application, and port piecemeal.
# ... obtain pylons WSGI application object ...
from mypylonsproject import thepylonsapp
class LegacyView(object):
def __init__(self, app):
self.app = app
def __call__(self, request):
return request.get_response(self.app)
if __name__ == '__main__':
legacy_view = LegacyView(thepylonsapp)
config = Configurator()
config.add_view(context='pyramid.exceptions.NotFound', view=legacy_view)
# ... rest of config ...At that point, whenever Pyramid cannot service a request because the URL doesn't match anything, it will invoke the Pylons application as a fallback, which will return things normally. At that point you can start moving logic incrementally into Pyramid from the Pylons application until you've ported everything.