Jeroen Demeyer wrote: > On 2019-07-02 23:29, Brett Cannon wrote: > > But two, this would be a semantic shift of what > > classes directly inherit from BaseException. > > It depends how you interpret that. I always interpreted classes > inheriting directly from BaseException as exceptions that you almost > never want to catch in an "except Exception" block.
As co-author of PEP 352 I can tell you the intent is the one I laid out. ;) (See https://www.python.org/dev/peps/pep-0352/#exception-hierarchy-changes.) > > Adding SystemError to that list would > > make it a unique error condition that doesn't inherit from Exception. > > I would argue that the various exception classes inheriting from > BaseException are already quite unique: a KeyboardInterrupt is very > different from a GeneratorExit for example. Depends on your view. To me they are both control flow; one is for generators, one is for whole applications, but the point of both is to bubble up a control flow shift as appropriate and not be caught by `except Exception` blocks. _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/EQHW2CKD4WDKZWQBB3BFFYJP2N2TYSXB/
