group.py 文件源码

def __getitem__(self, name):
        path = utils.path.name_to_asserted_group_path(name)
        if len(path.parts) > 1:
            top_directory = path.parts[0]
            sub_name = pathlib.PurePosixPath(*path.parts[1:])
            return self[top_directory][sub_name]

        if name not in self:
            raise KeyError("No such object: '" + str(name) + "'")

        directory = self.directory / path

        if exob.is_raw_object_directory(directory):  # TODO create one function that handles all Raw creation
            return raw.Raw(
                root_directory=self.root_directory,
                parent_path=self.relative_path,
                object_name=name,
                io_mode=self.io_mode # TODO validate name?
                # TODO plugin manager?
            )

        if not exob.is_nonraw_object_directory(directory):
            raise IOError(
                "Directory '" + directory +
                "' is not a valid exdir object."
            )

        meta_filename = directory / exob.META_FILENAME
        with meta_filename.open("r", encoding="utf-8") as meta_file:
            meta_data = yaml.safe_load(meta_file)
        if meta_data[exob.EXDIR_METANAME][exob.TYPE_METANAME] == exob.DATASET_TYPENAME:
            return ds.Dataset(
                root_directory=self.root_directory,
                parent_path=self.relative_path,
                object_name=name,
                io_mode=self.io_mode,
                validate_name=self.validate_name,
                plugin_manager=self.plugin_manager
            )
        elif meta_data[exob.EXDIR_METANAME][exob.TYPE_METANAME] == exob.GROUP_TYPENAME:
            return Group(
                root_directory=self.root_directory,
                parent_path=self.relative_path,
                object_name=name,
                io_mode=self.io_mode,
                validate_name=self.validate_name,
                plugin_manager=self.plugin_manager
            )
        else:
            print(
                "Object", name, "has data type",
                meta_data[exob.EXDIR_METANAME][exob.TYPE_METANAME]
            )
            raise NotImplementedError("Cannot open objects of this type")