class_docstr: Pseudo PDB that defers to the real pdb. 
class_docstr_tok: ["Pseudo","PDB","that","defers","to","the","real","pdb","."]
docstr: Invoke debugging via ``Pdb.set_trace``, dropping any IO capturing.
docstr_tok: ["Invoke","debugging","via","``","Pdb.set_trace","``",",","dropping","any","IO","capturing","."]
code: def set_trace(cls, *args, **kwargs):
      """Invoke debugging via ``Pdb.set_trace``, dropping any IO capturing."""
      tty()
      frame = sys._getframe().f_back
      _pdb = cls._init_pdb("set_trace", *args, **kwargs)
      _pdb.set_trace(frame)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import argparse
  import pdb
  import sys
  from doctest import UnexpectedException
  from _pytest import outcomes
  from _pytest.config import hookimpl
  from _pytest.config.exceptions import UsageError
label_desc: Use image node_id 5 for calling the pytestPDB obj's underlying member method code with example usage: obj.set_trace(cls) without return types