shyaml.py 文件源码

def _ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):
    """
    Ordered yaml loader
    Use this instead ot yaml.loader/yaml.saveloader to get an Ordereddict

    :param stream: stream to read from
    :param Loader: yaml-loader to use
    :object_pairs_hook: ...

    :return: OrderedDict structure
    """

    # usage example: ordered_load(stream, yaml.SafeLoader)
    class OrderedLoader(Loader):
        pass
    def construct_mapping(loader, node):
        loader.flatten_mapping(node)
        return object_pairs_hook(loader.construct_pairs(node))
    OrderedLoader.add_constructor(
        yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
        construct_mapping)
    return yaml.load(stream, OrderedLoader)