class_docstr: A generic way to store and retrieve arbitrary content or settings as a simple key/value store.
class_docstr_tok: ["A","generic","way","to","store","and","retrieve","arbitrary","content","or","settings","as","a","simple","key\/value","store","."]
docstr: Return the current value for a key or store the default value and return it.
  
  Works the same as the Python builtin dict object.
  
  :param key: Dict key for this Variable
  :param default: Default value to set and return if the variable
      isn't already in the DB
  :param description: Default value to set Description of the Variable
  :param deserialize_json: Store this as a JSON encoded value in the DB
      and un-encode it when retrieving a value
  :return: Mixed
docstr_tok: ["Return","the","current","value","for","a","key","or","store","the","default","value","and","return","it",".","Works","the","same","as","the","Python","builtin","dict","object",".",":","param","key",":","Dict","key","for","this","Variable",":","param","default",":","Default","value","to","set","and","return","if","the","variable","is","n't","already","in","the","DB",":","param","description",":","Default","value","to","set","Description","of","the","Variable",":","param","deserialize_json",":","Store","this","as","a","JSON","encoded","value","in","the","DB","and","un-encode","it","when","retrieving","a","value",":","return",":","Mixed"]
code: def setdefault(
      cls, key, default, description=None, deserialize_json=False
  ):
      """
      Return the current value for a key or store the default value and return it.
  
      Works the same as the Python builtin dict object.
  
      :param key: Dict key for this Variable
      :param default: Default value to set and return if the variable
          isn't already in the DB
      :param description: Default value to set Description of the Variable
      :param deserialize_json: Store this as a JSON encoded value in the DB
          and un-encode it when retrieving a value
      :return: Mixed
      """
      obj = Variable.get(
          key, default_var=None, deserialize_json=deserialize_json
      )
      if obj is None:
          if default is not None:
              Variable.set(
                  key,
                  default,
                  description=description,
                  serialize_json=deserialize_json,
              )
              return default
          else:
              raise ValueError("Default Value must be set")
      else:
          return obj
  
imports: from __future__ import annotations
  import json
  import logging
  from typing import TYPE_CHECKING, Any
  from sqlalchemy import Boolean, Column, Integer, String, Text, delete, select
  from sqlalchemy.dialects.mysql import MEDIUMTEXT
  from sqlalchemy.orm import declared_attr, reconstructor, synonym
  from airflow.api_internal.internal_api_call import internal_api_call
  from airflow.configuration import ensure_secrets_loaded
  from airflow.models.base import ID_LEN, Base
  from airflow.models.crypto import get_fernet
  from airflow.secrets.cache import SecretCache
  from airflow.secrets.metastore import MetastoreBackend
  from airflow.utils.log.logging_mixin import LoggingMixin
  from airflow.utils.log.secrets_masker import mask_secret
  from airflow.utils.session import provide_session
label_desc: Use image node_id 7 for calling the Variable obj's underlying member method code with example usage: obj.setdefault(cls, key, default, description, deserialize_json) and returns: obj, default