onf-c1/src/onf/graph/__init__.py

"""Demonstration-graph subsystem: the graph the ONF targets are read off.

Import submodules, never names, from this package -- from onf.graph import schema (a module),
not from onf.graph import GraphRetrieverNet (a name). This __init__ deliberately re-exports
NOTHING: it used to eagerly import gnn, which made every from onf.graph import schema
(including onf.config's, on the way to a single constant) pull in torch and the whole network.
See docs/technical/01-data-and-graph.md for the layering the emptiness of this file protects.
"""