class_docstr: Test basics.
class_docstr_tok: ["Test","basics","."]
code: def test_issubclass(self):
      class L(list):
          ...
  
      self.assertTrue(issubclass(L, list))
      with self.assertRaises(TypeError):
          issubclass(L, list[str])
  
imports: import unittest
  import pickle
  from array import array
  import copy
  from collections import defaultdict, deque, OrderedDict, Counter, UserDict, UserList
  from collections.abc import *
  from concurrent.futures import Future
  from concurrent.futures.thread import _WorkItem
  from contextlib import AbstractContextManager, AbstractAsyncContextManager
  from contextvars import ContextVar, Token
  from csv import DictReader, DictWriter
  from dataclasses import Field
  from functools import partial, partialmethod, cached_property
  from graphlib import TopologicalSorter
  from logging import LoggerAdapter, StreamHandler
  from mailbox import Mailbox, _PartialFile
  from difflib import SequenceMatcher
  from filecmp import dircmp
  from fileinput import FileInput
  from itertools import chain
  from http.cookies import Morsel
  from os import DirEntry
  from re import Pattern, Match
  from types import GenericAlias, MappingProxyType, AsyncGeneratorType
  from tempfile import TemporaryDirectory, SpooledTemporaryFile
  from urllib.parse import SplitResult, ParseResult
  from unittest.case import _AssertRaisesContext
  from queue import Queue, SimpleQueue
  from weakref import WeakSet, ReferenceType, ref
  import typing
  from typing import Unpack
  from typing import TypeVar
label_desc: Use image node_id 15 for calling the BaseTest obj's underlying member method code with example usage: obj.test_issubclass() without return types