zenpacklib.py 文件源码

def construct_specsparameters(loader, node, spectype):
        spec_class = {x.__name__: x for x in Spec.__subclasses__()}.get(spectype, None)

        if not spec_class:
            yaml_error(loader, yaml.constructor.ConstructorError(
                None, None,
                "Unrecognized Spec class %s" % spectype,
                node.start_mark))
            return

        if not isinstance(node, yaml.MappingNode):
            yaml_error(loader, yaml.constructor.ConstructorError(
                None, None,
                "expected a mapping node, but found %s" % node.id,
                node.start_mark))
            return

        specs = OrderedDict()
        for spec_key_node, spec_value_node in node.value:
            try:
                spec_key = str(loader.construct_scalar(spec_key_node))
            except yaml.MarkedYAMLError, e:
                yaml_error(loader, e)

            specs[spec_key] = construct_spec(spec_class, loader, spec_value_node)

        return specs