Hi there, when trying to use pdb, I spotted some kind of annoying behaviour of pdb: for pdb.pm, it still uses sys.last_traceback which is set by code.py This renders the function unusable in non-interactive contexts ... I suggest to change pdb.pm to use sys.exc_traceback instead. Any reasons not to do so? For Py3k, it might make sense to kill it. Besides that, some other places in the stdlib reference this attr as well: idle in 5 places ./lib-tk/Tkinter.py: sys.last_traceback = tb ./traceback.py: sys.last_value, sys.last_traceback, limit, file)'.""" ./traceback.py: print_exception(sys.last_type, sys.last_value, sys.last_traceback, ./pdb.py: post_mortem(sys.last_traceback) ./code.py: type, value, sys.last_traceback = sys.exc_info() ./code.py: sys.last_traceback = tb ./dis.py: tb = sys.last_traceback Kind regards, Alexander