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from repoze.bfg.request import Request
def get_root(app, request=None):
""" Return a tuple composed of ``(root, closer)`` when provided a
``repoze.bfg.router.Router`` instance as the ``app`` argument.
The ``root`` returned is the application root object. The
``closer`` returned is a callable (accepting no arguments) that
should be called when your scripting application is finished using
the root. If ``request`` is not None, it is used as the request
passed to the BFG application root factory. A faux request is
constructed and passed to the root factory if ``request`` is None."""
registry = app.registry
if request is None:
request = Request.blank('/')
request.registry = registry
threadlocals = {'registry':registry, 'request':request}
app.threadlocal_manager.push(threadlocals)
def closer(request=request): # keep request alive via this function default
app.threadlocal_manager.pop()
root = app.root_factory(request)
return root, closer
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