def preprocess_nodes_stdin() -> None:
# load the json from stdin
node_dicts = json.load(sys.stdin)
# parse the job dictionaries into hpc Job objects
nodes = [SchedulerNode.from_dict(n) for n in node_dicts]
# run our preprocessing
modified_nodes = preprocess_nodes(nodes)
# finally dump the modified jobs out to stdout
json.dump(modified_nodes, sys.stdout, default=lambda x: x.to_dict())
def test_schedulernode_json(a: SchedulerNode):
b = SchedulerNode.from_dict(a.to_dict())
assert _cmp(a, b)
