Metadata-Version: 2.0
Name: attrs
Version: 15.2.0
Summary: Attributes without boilerplate.
Home-page: https://attrs.readthedocs.org/
Author: Hynek Schlawack
Author-email: hs@ox.cx
License: MIT
Keywords: class,attribute,boilerplate
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Natural Language :: English
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Software Development :: Libraries :: Python Modules

======================================
attrs: Attributes without boilerplate.
======================================

.. image:: https://travis-ci.org/hynek/attrs.svg
   :target: https://travis-ci.org/hynek/attrs
   :alt: CI status

.. image:: https://codecov.io/github/hynek/attrs/coverage.svg?branch=master
   :target: https://codecov.io/github/hynek/attrs?branch=master
   :alt: Coverage

.. teaser-begin

``attrs`` is an `MIT <http://choosealicense.com/licenses/mit/>`_-licensed Python package with class decorators that ease the chores of implementing the most common attribute-related object protocols:

.. code-block:: pycon

   >>> import attr
   >>> @attr.s
   ... class C(object):
   ...     x = attr.ib(default=42)
   ...     y = attr.ib(default=attr.Factory(list))
   >>> i = C(x=1, y=2)
   >>> i
   C(x=1, y=2)
   >>> i == C(1, 2)
   True
   >>> i != C(2, 1)
   True
   >>> attr.asdict(i)
   {'y': 2, 'x': 1}
   >>> C()
   C(x=42, y=[])
   >>> C2 = attr.make_class("C2", ["a", "b"])
   >>> C2("foo", "bar")
   C2(a='foo', b='bar')

(If you don’t like the playful ``attr.s`` and ``attr.ib``, you can also use their no-nonsense aliases ``attr.attributes`` and ``attr.attr``).

You just specify the attributes to work with and ``attrs`` gives you:

- a nice human-readable ``__repr__``,
- a complete set of comparison methods,
- an initializer,
- and much more

*without* writing dull boilerplate code again and again.

This gives you the power to use actual classes with actual types in your code instead of confusing ``tuple``\ s or confusingly behaving ``namedtuple``\ s.

So put down that type-less data structures and welcome some class into your life!

.. note::
   I wrote an `explanation <https://attrs.readthedocs.org/en/latest/why.html#characteristic>`_ on why I forked my own ``characteristic``.
   It's not dead but ``attrs`` will have more new features.

``attrs``\ ’s documentation lives at `Read the Docs <https://attrs.readthedocs.org/>`_, the code on `GitHub <https://github.com/hynek/attrs>`_.
It’s rigorously tested on Python 2.6, 2.7, 3.3+, and PyPy.


Changelog
=========

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


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.


