code: def column_types_equal(a_coltype: TypeEngine, b_coltype: TypeEngine) -> bool:
        # noqa
      return str(a_coltype) == str(b_coltype)
docs: Checks that two SQLAlchemy column types are equal (by comparing ``str()``
      versions of them).
      
      See http://stackoverflow.com/questions/34787794/sqlalchemy-column-type-comparison.
      
      IMPERFECT.