This is gonna be a short one: If you want to trigger the ipdb and set breakpoints within the
ipython notebook the following won’t work:
import ipdb; ipdb.set_trace()
It will get you to the interactive debugger, but you won’t be able to do anything, e.g. print variables etc. (At least this was the case the last time I tried it).
Fortunately, you will get a working interactive debugger session by importing and calling the Tracer as described below (and also in this SO post):
from IPython.core.debugger import Tracer def fobar(n): x = 1337 y = x + n Tracer()() #this one triggers the debugger return y fobar(3)
As a quick reference for the debugger commands available I can warmly recommend the pdb cheatsheet by nblock.