import yaml

# https://stackoverflow.com/questions/5121931/in-python-how-can-you-load-yaml-mappings-as-ordereddicts

from collections import OrderedDict

def ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):

    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)

def ordered_dump(data, stream=None, Dumper=yaml.SafeDumper, **kwds):

    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)