On Sat, 03 Mar 2018 04:28:24 +0000, 高岡陽太 wrote: > Hello, > > I found a difference of behavior about `except` statement between > CPython 2.7 and 3.x . > `except EXC_CLASS:` calls `__subclasscheck__` in 2.7, but does not in > 3.x .
Python 3 does not accept virtual subclasses for exception handling. They have to be concrete subclasses of BaseException. There is a feature-request to support that (as Python 2.7 does): https://bugs.python.org/issue12029 but it is stalled. -- Steve -- https://mail.python.org/mailman/listinfo/python-list
