code: def define_tables(cls, metadata):
      Table(
          "mytable",
          metadata,
          Column("myid", Integer),
          Column("name", String(30)),
          Column("description", String(50)),
      )
      Table(
          "myothertable",
          metadata,
          Column("otherid", Integer),
          Column("othername", String(30)),
      )
  
imports: from sqlalchemy import and_
  from sqlalchemy import delete
  from sqlalchemy import exc
  from sqlalchemy import exists
  from sqlalchemy import ForeignKey
  from sqlalchemy import Integer
  from sqlalchemy import or_
  from sqlalchemy import select
  from sqlalchemy import String
  from sqlalchemy import testing
  from sqlalchemy.dialects import mysql
  from sqlalchemy.engine import default
  from sqlalchemy.testing import assert_raises_message
  from sqlalchemy.testing import AssertsCompiledSQL
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing import expect_deprecated
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing.schema import Column
  from sqlalchemy.testing.schema import Table
label_desc: Use image node_id 1 for calling the _DeleteTestBase obj's underlying member method code with example usage: obj.define_tables(cls, metadata) without return types