support.py 文件源码

def construct_odict(self, node):
        omap = OrderedDict()
        yield omap
        if not isinstance(node, yaml.SequenceNode):
            raise yaml.constructor.ConstructorError(
                "while constructing an ordered map",
                node.start_mark,
                "expected a sequence, but found %s" % node.id, node.start_mark
            )
        for subnode in node.value:
            if not isinstance(subnode, yaml.MappingNode):
                raise yaml.constructor.ConstructorError(
                    "while constructing an ordered map", node.start_mark,
                    "expected a mapping of length 1, but found %s" % subnode.id,
                    subnode.start_mark
                )
            if len(subnode.value) != 1:
                raise yaml.constructor.ConstructorError(
                    "while constructing an ordered map", node.start_mark,
                    "expected a single mapping item, but found %d items" % len(subnode.value),
                    subnode.start_mark
                )
            key_node, value_node = subnode.value[0]
            key = self.construct_object(key_node)
            value = self.construct_object(value_node)
            omap[key] = value