code: def sanitize_for_serialization(obj: V1Pod):
      """
      Convert pod to dict.... but *safely*.
  
      When pod objects created with one k8s version are unpickled in a python
      env with a more recent k8s version (in which the object attrs may have
      changed) the unpickled obj may throw an error because the attr
      expected on new obj may not be there on the unpickled obj.
  
      This function still converts the pod to a dict; the only difference is
      it populates missing attrs with None. You may compare with
      https://github.com/kubernetes-client/python/blob/5a96bbcbe21a552cc1f9cda13e0522fafb0dbac8/kubernetes/client/api_client.py#L202
  
      If obj is None, return None.
      If obj is str, int, long, float, bool, return directly.
      If obj is datetime.datetime, datetime.date
          convert to string in iso8601 format.
      If obj is list, sanitize each element in the list.
      If obj is dict, return the dict.
      If obj is OpenAPI model, return the properties dict.
  
      :param obj: The data to serialize.
      :return: The serialized form of data.
  
      :meta private:
      """
      if obj is None:
          return None
      elif isinstance(obj, (float, bool, bytes, str, int)):
          return obj
      elif isinstance(obj, list):
          return [
              sanitize_for_serialization(sub_obj) for sub_obj in obj
          ]
      elif isinstance(obj, tuple):
          return tuple(
              sanitize_for_serialization(sub_obj) for sub_obj in obj
          )
      elif isinstance(obj, (datetime.datetime, datetime.date)):
          return obj.isoformat()
  
      if isinstance(obj, dict):
          obj_dict = obj
      else:
          obj_dict = {
              obj.attribute_map[attr]: getattr(obj, attr)
              for attr, _ in obj.openapi_types.items()
              # below is the only line we change, and we just add default=None for getattr
              if getattr(obj, attr, None) is not None
          }
  
      return {
          key: sanitize_for_serialization(val)
          for key, val in obj_dict.items()
      }
  
imports: from __future__ import annotations
  import contextlib
  import copy
  import datetime
  import json
  import logging
  from typing import TYPE_CHECKING, Any, Generator, Iterable, overload
  from dateutil import relativedelta
  from sqlalchemy import TIMESTAMP, PickleType, event, nullsfirst, tuple_
  from sqlalchemy.dialects import mysql
  from sqlalchemy.types import JSON, Text, TypeDecorator
  from airflow.configuration import conf
  from airflow.serialization.enums import Encoding
  from airflow.utils.timezone import make_naive, utc
label_desc: Use image node_id 1 for calling a global function with example usage: sanitize_for_serialization(obj) and returns: unknown, None, obj, unknown, tuple, obj