gc_get_referrers.py 文件源码

def find_referring_graphs(obj):
    print('Looking for references to {!r}'.format(obj))
    referrers = (r for r in gc.get_referrers(obj)
                 if r not in REFERRERS_TO_IGNORE)
    for ref in referrers:
        if isinstance(ref, Graph):
            # A graph node
            yield ref
        elif isinstance(ref, dict):
            # An instance or other namespace dictionary
            for parent in find_referring_graphs(ref):
                yield parent


# Look for objects that refer to the objects in the graph.