ipdb without colors

ipdb.py

import sys

from IPython.Debugger import Pdb
from IPython.Shell import IPShell

shell = IPShell(argv=[''])

def set_trace():
    Pdb().set_trace(sys._getframe().f_back)

def post_mortem(tb):
    p = Pdb()
    p.reset()

    if tb is None:
        return

    while tb.tb_next is not None:
        tb = tb.tb_next

    p.interaction(tb.tb_frame, tb)

def pm():
    post_mortem(sys.last_traceback)