Adding function to sys.excepthook

Question

Say I have something like this, which sends unhanded exceptions to logging.critical():

import sys

def register_handler():
    orig_excepthook =         


        

Answer 1

You can just check if sys.excepthook is still built-in function before registering your handler:

>>> import sys, types
>>> isinstance(sys.excepthook, types.BuiltinFunctionType)
True
>>> sys.excepthook = lambda x: x
>>> isinstance(sys.excepthook, types.BuiltinFunctionType)
False