item_conversion.py 文件源码

def _ordered_dump(data, stream=None, Dumper=yaml.Dumper, **kwds):
    """
    Ordered yaml dumper
    Use this instead ot yaml.Dumper/yaml.SaveDumper to get an Ordereddict

    :param stream: stream to write to
    :param Dumper: yaml-dumper to use
    :**kwds: Additional keywords

    :return: OrderedDict structure
    """

    # usage example: ordered_dump(data, Dumper=yaml.SafeDumper)
    class OrderedDumper(Dumper):
        pass
    def _dict_representer(dumper, data):
        return dumper.represent_mapping(
            yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
            data.items())
    OrderedDumper.add_representer(OrderedDict, _dict_representer)
    return yaml.dump(data, stream, OrderedDumper, **kwds)