__init__.py 文件源码

def load_ordered_config(config_path):
    """
      Loads the configuration in the same order as it's defined in yaml file,
      so that, while saving it in new format, order is maintained
      Args:
            config_path (str): Path to the configuration file
      Returns:
            config(dict): Returns the configurations in the defined ordered
    """

    #  To load data from yaml in ordered dict format
    _mapping_tag = yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG

    def dict_representer(dumper, data):
        return dumper.represent_mapping(_mapping_tag, data.iteritems())

    def dict_constructor(loader, node):
        return collections.OrderedDict(loader.construct_pairs(node))

    yaml.add_representer(collections.OrderedDict, dict_representer)
    yaml.add_constructor(_mapping_tag, dict_constructor)

    #  format the output to print a blank scalar rather than null
    def represent_none(self, _):
        return self.represent_scalar('tag:yaml.org,2002:null', u'')

    yaml.add_representer(type(None), represent_none)

    # read input from home directory for pull requests
    with open(config_path, 'r') as f:
        config = yaml.load(f)
    return config