Author: jeremy.hylton Date: Tue Feb 27 19:33:31 2007 New Revision: 53998 Modified: python/trunk/Misc/NEWS Log: Add news about changes to metaclasses and __bases__ error checking. Modified: python/trunk/Misc/NEWS ============================================================================== --- python/trunk/Misc/NEWS (original) +++ python/trunk/Misc/NEWS Tue Feb 27 19:33:31 2007 @@ -126,6 +126,13 @@ - Bug #1664966: Fix crash in exec if Unicode filename can't be decoded. +- Add new requirements for metaclasses. 1) If type or a subclass of type + occurs in __bases__, it must occur before any non-type bases, e.g. + before regular classes. 2) If you assign to __bases__, you may not + change the metaclass. Many more illegal assignments to __bases__ + are now checked and raise TypeErrors. This changed fixed at least + one known crash. + Library -------