- update to 16.0.0
Backward-incompatible changes:
* Python 3.3 and 2.6 aren’t supported anymore. They may work by chance but
any effort to keep them working has ceased.
The last Python 2.6 release was on October 29, 2013 and isn’t supported by
the CPython core team anymore. Major Python packages like Django and Twisted
dropped Python 2.6 a while ago already.
Python 3.3 never had a significant user base and wasn’t part of any
distribution’s LTS release.
Changes:
* __slots__ have arrived! Classes now can automatically be slots-style (and
save your precious memory) just by passing slots=True. #35
* Allow the case of initializing attributes that are set to init=False. This
allows for clean initializer parameter lists while being able to initialize
attributes to default values. #32
* attr.asdict can now produce arbitrary mappings instead of Python dicts when
provided with a dict_factory argument. #40 Multiple performance improvements.