python 保证yaml数据加载和导出有序

#!/usr/bin/env python
# encoding: utf-8
# coding style: pep8
# ====================================================
#   Copyright (C)2020 All rights reserved.
#
#   Author        : xxx
#   Email         : [email protected]
#   File Name     : ordered_yaml_load_dump.py
#   Last Modified : 2020-03-10 16:43
#   Description   :
#
# ====================================================

import sys
# import os

# -* encoding:utf-8 -*-
from collections import OrderedDict
import yaml
import os


def ordered_yaml_load(yaml_path, 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)
    with open(yaml_path) as stream:
        return yaml.load(stream, OrderedLoader)


def ordered_yaml_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)