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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def tree(obj):
 """ Convert object to a tree of lists, dicts and simple values. The result can be serialized to JSON. """

    from .objects import Object
    if isinstance(obj, (bool, int, float, str, bytes)):
        return obj
    elif isinstance(obj, (datetime.date, datetime.time)):
        return obj.isoformat()
    elif isinstance(obj, dict):
        return {k: tree(v) for k, v in obj.items()}
    elif isinstance(obj, (list, tuple, set)):
        return [tree(i) for i in obj]
    elif isinstance(obj, Object):
        return {obj.__class__.__qualname__: tree(obj.nonDefaults())}
    else:
        return str(obj)