code: def set_trace(frame=None):
      """
      Start debugging from `frame`.
  
      If frame is not specified, debugging starts from caller's frame.
      """
      Pdb().set_trace(frame or sys._getframe().f_back)
  
imports: import inspect
  import linecache
  import sys
  import re
  import os
  from IPython import get_ipython
  from contextlib import contextmanager
  from IPython.utils import PyColorize
  from IPython.utils import coloransi, py3compat
  from IPython.core.excolors import exception_colors
  from pdb import Pdb
label_desc: Use image node_id 6 for calling a global function with example usage: set_trace(frame) without return types