Can you bring Python debugger back to the original exception during custom exception handling?

My code is raising a custom exception which is putting my debugger in the wrong place. For example in the following code, I would like to print the value of my important_local_variable from the debugger, however it seems to be inaccessable as the debugger is starting inside the CustomException:

test.py

class CustomException(Exception):
    pass

def my_func():
    important_local_variable = 0
    badness = 1/important_local_variable

try:
    my_func()
except:
    raise CustomException

python3 -m ipdb test.py
bash-3.2$ python3 -m pdb test.py
> /Users/max/test.py(1)<module>()
-> class CustomException(Exception):
(Pdb)

from Can you bring Python debugger back to the original exception during custom exception handling?