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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
Description: ======================================
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.
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
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