code: def unpack_singleton(x):
      if isinstance(x, (list, tuple)) and len(x) == 1:
          return x[0]
      return x
  
imports: import copy
  import inspect
  import warnings
  import tree
  from keras import backend
  from keras import ops
  from keras.backend.common import global_state
  from keras.layers.input_spec import InputSpec
  from keras.layers.layer import Layer
  from keras.legacy.saving import saving_utils
  from keras.legacy.saving import serialization
  from keras.models.model import Model
  from keras.ops.function import Function
  from keras.ops.function import make_node_key
  from keras.saving import serialization_lib
  from keras.utils import tracking
label_desc: Use image node_id 4 for calling a global function with example usage: unpack_singleton(x) and returns: x, x