code: def default_summary_fmt() -> Optional[str]:
      """Summary printing format as understood by :mod:`tabulate` or a special case "notebook"."""
      return config().summary_fmt
  
imports: import contextlib
  import os
  from dataclasses import dataclass, field, replace
  from typing import Any, Dict, Generator, List, Mapping, Optional, Union
  import numpy
  import tabulate
  import tensorflow
  import tensorflow_probability
label_desc: Use image node_id 17 for calling a global function with example usage: default_summary_fmt() and returns: config