Zachary Ware added the comment:
Try varying the order of what you're doing there:
>>> import pdb, sys
>>> pdb.pm()
Traceback ...
>>> pdb.pm()
See https://docs.python.org/3/library/sys.html#sys.last_traceback, which notes
that this attribute is not always present (it won't be if no exception
New submission from ThePokestarFan :
When testing PDB in python 3.8.1, PDB throws an exception when I call the pm()
function in PDB without importing system.
[Fresh session]
>>> import pdb
>>> pdb.pm()
Traceback (most recent call last):
File "", line 1, in
File
"/Library/Frameworks/Pytho
