Per PEP8[1] and the Python docs[2], custom exceptions defined in library
code should not normally derive from BaseException, which is reserved
for exceptions that should not normally be caught (e.g.
KeyboardInterrupt, SystemExit). Deriving from BaseException makes it
difficult for application code to catch and reraise this exception
safely.
Per PEP8[1] and the Python docs[2], custom exceptions defined in library code should not normally derive from BaseException, which is reserved for exceptions that should not normally be caught (e.g.
KeyboardInterrupt,SystemExit). Deriving from BaseException makes it difficult for application code to catch and reraise this exception safely.[1] https://peps.python.org/pep-0008/#programming-recommendations [2] https://docs.python.org/3/library/exceptions.html#Exception