attrs/CHANGELOG.rst

Changelog
=========

Versions are year-based with a strict backwards compatibility policy.
The third digit is only for regressions.


16.1.0 (UNRELEASED)
-------------------

Deprecations:
^^^^^^^^^^^^^

- Accessing ``Attribute`` instances on class objects is now deprecated and will stop working in 2017.
  If you need introspection please use the ``__attrs_attrs__`` attribute that carries them too.
  In the future, the attributes that are defined on the class body and are usually overwritten in your ``__init__`` method are simply removed after ``@attr.s`` has been applied.

  This will remove the confusing error message if you write your own ``__init__`` and forget to initialize some attribute.
  Instead you will get a straightforward ``AttributeError``.
  In other words: decorated classes will work more like plain Python classes which was always ``attrs``'s goal.


Changes:
^^^^^^^^

- ``attr.asdict``\ 's ``dict_factory`` arguments is now propagated on recursion.
  `#45 <https://github.com/hynek/attrs/issues/45>`_
- ``attr.asdict`` and ``attr.has`` are significantly faster.
  `#48 <https://github.com/hynek/attrs/issues/48>`_


----


16.0.0 (2016-05-23)
-------------------

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 <https://docs.python.org/3.5/reference/datamodel.html#slots>`_-style (and save your precious memory) just by passing ``slots=True``.
  `#35 <https://github.com/hynek/attrs/issues/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 <https://github.com/hynek/attrs/issues/32>`_
- ``attr.asdict`` can now produce arbitrary mappings instead of Python ``dict``\ s when provided with a ``dict_factory`` argument.
  `#40 <https://github.com/hynek/attrs/issues/40>`_
- Multiple performance improvements.


----


15.2.0 (2015-12-08)
-------------------

Changes:
^^^^^^^^

- Add a ``convert`` argument to ``attr.ib``, which allows specifying a function to run on arguments.
  This allows for simple type conversions, e.g. with ``attr.ib(convert=int)``.
  `#26 <https://github.com/hynek/attrs/issues/26>`_
- Speed up object creation when attribute validators are used.
  `#28 <https://github.com/hynek/attrs/issues/28>`_


----


15.1.0 (2015-08-20)
-------------------

Changes:
^^^^^^^^

- Add ``attr.validators.optional`` that wraps other validators allowing attributes to be ``None``.
  `#16 <https://github.com/hynek/attrs/issues/16>`_
- Fix multi-level inheritance.
  `#24 <https://github.com/hynek/attrs/issues/24>`_
- Fix ``__repr__`` to work for non-redecorated subclasses.
  `#20 <https://github.com/hynek/attrs/issues/20>`_


----


15.0.0 (2015-04-15)
-------------------

Changes:
^^^^^^^^

Initial release.