code: def make_key(*, x):
      try:
          hash(x)
          if x is not None:
              x < x
          return x
      except TypeError as exc:
          if (
              isinstance(x, tuple)
              and len(x) > 0
              and all(isinstance(y, tf.Variable) for y in x)
          ):
              return tuple(y.name for y in x)
          elif isinstance(x, Module):
              return x.__class__.__name__
          elif hasattr(x, "__name__"):
              return x.__name__
          else:
              raise exc
  
imports: import functools
  import json
  import os
  import re
  import numpy
  import tensorflow
  from tensorforce import TensorforceError, util
  import tensorforce.core
  from tensorforce.core import SignatureDict, TensorSpec, tf_util, VariableDict
label_desc: Use image node_id 1 for calling a global function with example usage: make_key() and returns: x, tuple, x, x