serializer.py 文件源码

def construct_mapping(cls, loader, node, deep=False):
        """Based on yaml.loader.BaseConstructor.construct_mapping."""
        if not isinstance(node, yaml.MappingNode):
            raise yaml.loader.ConstructorError(
                None, None, "expected a mapping node, but found %s" % node.id,
                node.start_mark)

        mapping = OrderedYamlDict()
        for key_node, value_node in node.value:
            key = loader.construct_object(key_node, deep=deep)
            try:
                hash(key)
            except TypeError, exc:
                raise yaml.loader.ConstructorError(
                    "while constructing a mapping", node.start_mark,
                    "found unacceptable key (%s)" % exc, key_node.start_mark)

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

        return mapping