Andrew Barnert wrote: > On Oct 14, 2019, at 07:15, Steven D'Aprano [email protected] wrote: > > Speaking of UserString, does anyone know why it isn't > > registered as a > > virtual subclass of str? > > None of the concrete classes register virtual subclasses, so this would be a > unique exception.
See the final lines in https://github.com/python/cpython/blob/3.7/Lib/_collections_abc.py MutableSequence.register(list) MutableSequence.register(bytearray) # Multiply inheriting, see ByteString [snip] _______________________________________________ Python-ideas mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/[email protected]/message/ZESVNXIZADLEVPBBUJCMEAE2NCV2TXP7/ Code of Conduct: http://python.org/psf/codeofconduct/
