code: def set_default_value(dictionary, key, value):
      if key not in dictionary:
          dictionary[key] = value
  
imports: import copy
  import functools
  import os
  import random
  import subprocess
  import weakref
  from collections import OrderedDict
  from collections.abc import Mapping
  from typing import Any, Dict, TYPE_CHECKING
  import numpy
  import torch
  from ludwig.api_annotations import DeveloperAPI
  from ludwig.constants import PROC_COLUMN
  from ludwig.globals import DESCRIPTION_FILE_NAME
  from ludwig.utils import fs_utils
  from ludwig.utils.fs_utils import find_non_existing_dir_by_adding_suffix
label_desc: Use image node_id 5 for calling a global function with example usage: set_default_value(dictionary, key, value) without return types