diff options
Diffstat (limited to 'Misc/NEWS')
| -rw-r--r-- | Misc/NEWS | 17 |
1 files changed, 8 insertions, 9 deletions
@@ -4,15 +4,14 @@ Release date: 28-Sep-2100 Type/class unification and new-style classes -- New-style classes are now dynamic by default. Previous, they were - static (meaning class attributes could not be assigned to) and - dynamic classes had to be requested by adding __dynamic__ = 1 to the - body of the class or to the module. Static classes are faster than - dynamic classes, but dynamic classes are now at most 50% slower than - static classes; previously, they could be up to 10x slower. (This - was accomplished by making dynamic classes faster, not by making - static classes slower. :-) Note that according to one benchmark, - static classes are about the same speed as classic classes. +- New-style classes are now always dynamic (except for built-in and + extension types). There was no longer a performance penalty, and I + no longer see another reason to keep this baggage around. One relic + remains: the __dict__ or a new-style class is a read-only proxy. + You must set the class's attribute to modify. As a consequence, the + __defined__ attribute of new-style types no longer exists, for lack + of need: there is once again only one __dict__ (although in the + future a __cache__ may be resurrected in its place). - C.__doc__ now works as expected for new-style classes (in 2.2a4 it always returned None, even when there was a class docstring). |