code: def test_add_table_comment(self):
      m1 = MetaData()
      m2 = MetaData()
  
      Table(
          "some_table", m1, Column("test", String(10), primary_key=True)
      )
  
      Table(
          "some_table",
          m2,
          Column("test", String(10), primary_key=True),
          comment="this is some table",
      )
  
      diffs = self._fixture(m1, m2)
  
      eq_(diffs[0][0], "add_table_comment")
      eq_(diffs[0][1].comment, "this is some table")
      eq_(diffs[0][2], None)
  
file_path: alembic/alembic/testing/suite/test_autogen_comments.py
imports: from sqlalchemy import Column
  from sqlalchemy import Float
  from sqlalchemy import MetaData
  from sqlalchemy import String
  from sqlalchemy import Table
  from ._autogen_fixtures import AutogenFixtureTest
  from ...testing import eq_
  from ...testing import mock
  from ...testing import TestBase
label_desc: Use image node_id 2 for calling the AutogenerateCommentsTest obj's underlying member method code with example usage: obj.test_add_table_comment() without return types