code: def _init_class(cls):
      if cls.run_define_tables == "each":
          if cls.run_create_tables == "once":
              cls.run_create_tables = "each"
          assert cls.run_inserts in ("each", None)
  
      cls.other = adict()
      cls.tables = adict()
      cls.sequences = adict()
  
      cls.bind = cls.setup_bind()
      cls._tables_metadata = sa.MetaData()
  
imports: from __future__ import annotations
  import itertools
  import random
  import re
  import sys
  import sqlalchemy
  from .base import TestBase
  from ..None import config
  from ..None import mock
  from ..assertions import eq_
  from ..assertions import ne_
  from ..util import adict
  from ..util import drop_all_tables_from_metadata
  from ...None import event
  from ...None import util
  from ...schema import sort_tables_and_constraints
  from ...sql import visitors
  from ...sql.elements import ClauseElement
label_desc: Use image node_id 4 for calling the TablesTest obj's underlying member method code with example usage: obj._init_class(cls) without return types