ordered_dict_yaml_loader.py 文件源码

def construct_mapping(self, node, deep=False):
        if isinstance(node, yaml.MappingNode):
            self.flatten_mapping(node)
        else:
            raise yaml.constructor.ConstructorError(
                None
              , None
              , 'expected a mapping node, but found {}'.format(node.id)
              , node.start_mark
              )

        mapping = collections.OrderedDict()
        for key_node, value_node in node.value:
            key = self.construct_object(key_node, deep=deep)
            try:
                hash(key)

            except TypeError as ex:
                raise yaml.constructor.ConstructorError(
                    'while constructing a mapping'
                  , node.start_mark
                  , 'found unacceptable key `{}`'.format(ex)
                  , key_node.start_mark
                  )

            value = self.construct_object(value_node, deep=deep)
            mapping[key] = value

        return mapping