code: def smart_case(
      pred_fn_pairs, default=None, exclusive=False, name="smart_case"
  ):
      """Like tf.case, except attempts to statically evaluate predicates.
  
      If any predicate in `pred_fn_pairs` is a bool or has a constant value, the
      associated callable will be called or omitted depending on its value.
      Otherwise this functions like tf.case.
  
      Args:
        pred_fn_pairs: Dict or list of pairs of a boolean scalar tensor and a
                       callable which returns a list of tensors.
        default: Optional callable that returns a list of tensors.
        exclusive: True iff at most one predicate is allowed to evaluate to `True`.
        name: A name for this operation (optional).
  
      Returns:
        The tensors returned by the first pair whose predicate evaluated to True, or
        those returned by `default` if none does.
  
      Raises:
        TypeError: If `pred_fn_pairs` is not a list/dictionary.
        TypeError: If `pred_fn_pairs` is a list but does not contain 2-tuples.
        TypeError: If `fns[i]` is not callable for any i, or `default` is not
                   callable.
      """
      return control_flow_case._case_helper(  # pylint: disable=protected-access
          smart_cond,
          pred_fn_pairs,
          default,
          exclusive,
          name,
          allow_python_preds=True,
      )
  
imports: from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.ops import cond
  from tensorflow.python.ops import control_flow_case
  from tensorflow.python.util.tf_export import tf_export
label_desc: Use image node_id 3 for calling a global function with example usage: smart_case(pred_fn_pairs, default, exclusive, name) and returns: control_flow_case