code: def format_stack(f=None, limit=None):
      """Shorthand for 'format_list(extract_stack(f, limit))'."""
      if f is None:
          f = sys._getframe().f_back
      return format_list(extract_stack(f, limit=limit))
  
imports: import collections.abc
  import itertools
  import linecache
  import sys
  import textwrap
  from contextlib import suppress
label_desc: Use image node_id 16 for calling a global function with example usage: format_stack(f, limit) and returns: format_list