code: def get_datatype(cls, type_code: Any) -> Optional[str]:
      if not cls.type_code_map:
          # only import and store if needed at least once
          # pylint: disable=import-outside-toplevel
          import MySQLdb
  
          ft = MySQLdb.constants.FIELD_TYPE
          cls.type_code_map = {
              getattr(ft, k): k
              for k in dir(ft)
              if not k.startswith("_")
          }
      datatype = type_code
      if isinstance(type_code, int):
          datatype = cls.type_code_map.get(type_code)
      if datatype and isinstance(datatype, str) and datatype:
          return datatype
      return None
  
imports: import contextlib
  import re
  from datetime import datetime
  from decimal import Decimal
  from re import Pattern
  from typing import Any, Callable, Optional
  from urllib import parse
  from flask_babel import gettext
  from sqlalchemy import types
  from sqlalchemy.dialects.mysql import BIT, DECIMAL, DOUBLE, FLOAT, INTEGER, LONGTEXT, MEDIUMINT, MEDIUMTEXT, TINYINT, TINYTEXT
  from sqlalchemy.engine.url import URL
  from superset.constants import TimeGrain
  from superset.db_engine_specs.base import BaseEngineSpec, BasicParametersMixin
  from superset.errors import SupersetErrorType
  from superset.models.sql_lab import Query
  from superset.utils.core import GenericDataType
label_desc: Use image node_id 4 for calling the MySQLEngineSpec obj's underlying member method code with example usage: obj.get_datatype(cls, type_code) and returns: None, datatype