class_docstr: Modified Pdb class, does not load readline.
  
  for a standalone version that uses prompt_toolkit, see
  `IPython.terminal.debugger.TerminalPdb` and
  `IPython.terminal.debugger.set_trace()`
  
  
  This debugger can hide and skip frames that are tagged according to some predicates.
  See the `skip_predicates` commands.
class_docstr_tok: ["Modified","Pdb","class",",","does","not","load","readline",".","for","a","standalone","version","that","uses","prompt_toolkit",",","see","`","IPython.terminal.debugger.TerminalPdb","`","and","`","IPython.terminal.debugger.set_trace","(",")","`","This","debugger","can","hide","and","skip","frames","that","are","tagged","according","to","some","predicates",".","See","the","`","skip_predicates","`","commands","."]
docstr: Perform useful escapes on the command before it is executed.
docstr_tok: ["Perform","useful","escapes","on","the","command","before","it","is","executed","."]
code: def precmd(self, line):
      """Perform useful escapes on the command before it is executed."""
  
      if line.endswith("??"):
          line = "pinfo2 " + line[:-2]
      elif line.endswith("?"):
          line = "pinfo " + line[:-1]
  
      line = super().precmd(line)
  
      return line
  
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 7 for calling the Pdb obj's underlying member method code with example usage: obj.precmd(line) and returns: line