class_docstr: Mock downloading a tar.gz archive with a single file.
class_docstr_tok: ["Mock","downloading","a","tar.gz","archive","with","a","single","file","."]
code: def _get_path(self) -> str:
      return constants.RESOURCES.joinpath("nations.tar.gz")
  
imports: import pathlib
  import unittest
  from io import BytesIO
  from urllib.request import urlopen
  from pykeen.datasets import Kinships, Nations, dataset_resolver
  from pykeen.datasets.base import PackedZipRemoteDataset, SingleTabbedDataset, TarFileRemoteDataset, TarFileSingleDataset, UnpackedRemoteDataset
  from pykeen.datasets.nations import NATIONS_TEST_PATH, NATIONS_TRAIN_PATH, NATIONS_VALIDATE_PATH
  from tests import cases, constants
label_desc: Use image node_id 2 for calling the MockTarFileSingleDataset obj's underlying member method code with example usage: obj._get_path() and returns: constants